diff --git a/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt b/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
--- a/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
+++ b/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
@@ -5,6 +5,8 @@
 mlir_tablegen(HLFIRDialect.cpp.inc -gen-dialect-defs -dialect=hlfir)
 mlir_tablegen(HLFIRAttributes.h.inc -gen-attrdef-decls -attrdefs-dialect=hlfir)
 mlir_tablegen(HLFIRAttributes.cpp.inc -gen-attrdef-defs -attrdefs-dialect=hlfir)
+mlir_tablegen(HLFIREnums.h.inc -gen-enum-decls)
+mlir_tablegen(HLFIREnums.cpp.inc -gen-enum-defs)
 
 set(LLVM_TARGET_DEFINITIONS HLFIROps.td)
 mlir_tablegen(HLFIROps.h.inc -gen-op-decls)
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h b/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
--- a/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
@@ -26,6 +26,8 @@
 
 #include "flang/Optimizer/HLFIR/HLFIRDialect.h.inc"
 
+#include "flang/Optimizer/HLFIR/HLFIREnums.h.inc"
+
 #define GET_TYPEDEF_CLASSES
 #include "flang/Optimizer/HLFIR/HLFIRTypes.h.inc"
 
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td b/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
--- a/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
@@ -15,6 +15,7 @@
 #define FORTRAN_DIALECT_HLFIR_OP_BASE
 
 include "mlir/IR/AttrTypeBase.td"
+include "mlir/IR/EnumAttr.td"
 include "mlir/IR/OpBase.td"
 include "flang/Optimizer/Dialect/FIRTypes.td"
 
@@ -133,4 +134,12 @@
 def AnyFortranLogicalOrI1ArrayObject : Type<IsMaskArgumentPred,
     "A scalar i1 or logical or an array-like object containing logicals">;
 
+def hlfir_CharExtremumPredicateAttr : I32EnumAttr<
+    "CharExtremumPredicate", "",
+    [
+      I32EnumAttrCase<"min", 0>,
+      I32EnumAttrCase<"max", 1>
+    ]> {
+  let cppNamespace = "hlfir";
+}
 #endif // FORTRAN_DIALECT_HLFIR_OP_BASE
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
--- a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
@@ -317,6 +317,29 @@
   let hasVerifier = 1;
 }
 
+def hlfir_CharExtremumOp : hlfir_Op<"char_extremum", []> {
+  let summary = "Find max/min from given character strings";
+  let description = [{
+    Find the minimum or maximum of two or more character strings of a same character kind and return the string with the minimum or maximum number of characters. Example:
+
+    %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+  }];
+
+  let arguments = (ins hlfir_CharExtremumPredicateAttr:$predicate,
+                  Variadic<AnyScalarCharacterEntity>:$strings
+  );
+
+  let results = (outs AnyScalarCharacterExpr);
+
+  let assemblyFormat = [{
+    $predicate `,` $strings attr-dict `:` functional-type(operands, results)
+  }];
+
+  let builders = [OpBuilder<(ins "hlfir::CharExtremumPredicate":$predicate, "mlir::ValueRange":$strings)>];
+
+  let hasVerifier = 1;
+}
+
 def hlfir_SetLengthOp : hlfir_Op<"set_length", []> {
   let summary = "change the length of a character entity";
   let description = [{
diff --git a/flang/lib/Lower/ConvertCall.cpp b/flang/lib/Lower/ConvertCall.cpp
--- a/flang/lib/Lower/ConvertCall.cpp
+++ b/flang/lib/Lower/ConvertCall.cpp
@@ -1283,13 +1283,19 @@
       hlfir::Entity actual = arg->getOriginalActual();
       mlir::Value valArg;
 
-      fir::ArgLoweringRule argRules =
-          fir::lowerIntrinsicArgumentAs(*argLowering, i);
-      if (!argRules.handleDynamicOptional &&
-          argRules.lowerAs != fir::LowerIntrinsicArgAs::Inquired)
-        valArg = hlfir::derefPointersAndAllocatables(loc, builder, actual);
-      else
-        valArg = actual.getBase();
+      // if intrinsic handler has no lowering rules
+      if (!argLowering) {
+        valArg = hlfir::loadTrivialScalar(loc, builder, actual);
+      }
+      else {
+        fir::ArgLoweringRule argRules =
+            fir::lowerIntrinsicArgumentAs(*argLowering, i);
+        if (!argRules.handleDynamicOptional &&
+            argRules.lowerAs != fir::LowerIntrinsicArgAs::Inquired)
+          valArg = hlfir::derefPointersAndAllocatables(loc, builder, actual);
+        else
+          valArg = actual.getBase();
+      }
 
       operands.emplace_back(valArg);
     }
@@ -1354,6 +1360,28 @@
     return {hlfir::EntityWithAttributes{transposeOp.getResult()}};
   }
 
+  if (intrinsicName == "min" || intrinsicName == "max") {
+      bool argsAreCharacterType = true;
+
+      for (std::optional<PreparedActualArgument> arg : loweredActuals)
+        if (!arg->getOriginalActual().isCharacter()) {
+          argsAreCharacterType = false;
+          break;
+        }
+
+      if (argsAreCharacterType) {
+        llvm::SmallVector<mlir::Value> operands = getOperandVector(loweredActuals);
+        assert(operands.size() >= 2);
+
+        hlfir::CharExtremumPredicate pred = (intrinsicName == "min") ? 
+          hlfir::CharExtremumPredicate::min : hlfir::CharExtremumPredicate::max; 
+        hlfir::CharExtremumOp charExtremumOp = 
+            builder.create<hlfir::CharExtremumOp>(loc, pred, mlir::ValueRange{operands});
+            //builder.create<hlfir::CharExtremumOp>(loc, pred, mlir::ValueRange{operands[0], operands[1]});
+        return {hlfir::EntityWithAttributes{charExtremumOp.getResult()}};
+      }
+  }
+
   // TODO add hlfir operations for other transformational intrinsics here
 
   // fallback to calling the intrinsic via fir.call
diff --git a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
--- a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
+++ b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
@@ -485,6 +485,48 @@
   build(builder, result, resultType, strings, len);
 }
 
+//===----------------------------------------------------------------------===//
+// CharExtremumOp
+//===----------------------------------------------------------------------===//
+
+mlir::LogicalResult hlfir::CharExtremumOp::verify() {
+  // there could probably be some refactoring between this verify() and ConcatOp's verify since they're the same...
+  if (getStrings().size() < 2)
+    return emitOpError("must be provided at least two string operands");
+  unsigned kind = getCharacterKind(getResult().getType());
+  for (auto string : getStrings())
+    if (kind != getCharacterKind(string.getType()))
+      return emitOpError("strings must have the same KIND as the result type");
+  return mlir::success();
+}
+
+void hlfir::CharExtremumOp::build(mlir::OpBuilder &builder,
+                            mlir::OperationState &result,
+                            hlfir::CharExtremumPredicate predicate,
+                            mlir::ValueRange strings) {
+
+  fir::CharacterType::LenType resultTypeLen = 0;
+  assert(!strings.empty() && "must contain operands");
+  unsigned kind = getCharacterKind(strings[0].getType());
+  for (auto string : strings)
+    if (auto cstLen = getCharacterLengthIfStatic(string.getType())) {
+      if (resultTypeLen == 0)
+        resultTypeLen = *cstLen;
+      else if (resultTypeLen > *cstLen)
+        resultTypeLen = *cstLen;
+
+    } else {
+      resultTypeLen = fir::CharacterType::unknownLen();
+      break;
+    }
+  auto resultType = hlfir::ExprType::get(
+      builder.getContext(), hlfir::ExprType::Shape{},
+      fir::CharacterType::get(builder.getContext(), kind, resultTypeLen),
+      false);
+
+  build(builder, result, resultType, predicate, strings);
+}
+
 //===----------------------------------------------------------------------===//
 // SetLengthOp
 //===----------------------------------------------------------------------===//
@@ -887,4 +929,5 @@
 }
 
 #define GET_OP_CLASSES
+#include "flang/Optimizer/HLFIR/HLFIREnums.cpp.inc"
 #include "flang/Optimizer/HLFIR/HLFIROps.cpp.inc"
diff --git a/flang/test/HLFIR/char_extremum.fir b/flang/test/HLFIR/char_extremum.fir
new file mode 100644
--- /dev/null
+++ b/flang/test/HLFIR/char_extremum.fir
@@ -0,0 +1,130 @@
+// Test hlfir.char_extremum operation parse, verify (no errors), and unparse.
+
+// RUN: fir-opt %s | fir-opt | FileCheck %s
+
+
+// variable check
+func.func @char_extremum_min_var(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_min_var(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_var(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>) { 
+%0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_max_var(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+
+func.func @char_extremum_min_var_variadic(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>, %arg2: !fir.ref<!fir.char<1,30>>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_min_var_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:.*]]: !fir.ref<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_var_variadic(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>, %arg2: !fir.ref<!fir.char<1,30>>) { 
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_max_var_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:.*]]: !fir.ref<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+
+
+// boxchar check
+func.func @char_extremum_min_boxchar(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>) {
+ %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_boxchar(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_max_boxchar(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>) {
+ %0 = hlfir.char_extremum max, %arg0, %arg1 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_boxchar(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]] : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_min_boxchar_variadic(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>, %arg2: !fir.boxchar<1>, %arg3: !fir.boxchar<1>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2, %arg3 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_boxchar_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_3:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]], %[[VAL_3]] : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_max_boxchar_variadic(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>, %arg2: !fir.boxchar<1>, %arg3: !fir.boxchar<1>) { 
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2, %arg3 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_boxchar_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_3:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]], %[[VAL_3]] : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+
+//expr check
+func.func @char_extremum_min_expr(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>) {
+  %0 = hlfir.char_extremum min, %arg0, %arg1 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> (!hlfir.expr<!fir.char<1,10>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_expr(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_expr(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>) {
+  %0 = hlfir.char_extremum max, %arg0, %arg1 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> (!hlfir.expr<!fir.char<1,20>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_expr(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+
+func.func @char_extremum_min_expr_variadic(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>, %arg2: !hlfir.expr<!fir.char<1,30>>) {
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> (!hlfir.expr<!fir.char<1,10>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_expr_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_expr_variadic(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>, %arg2: !hlfir.expr<!fir.char<1,30>>) {
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> (!hlfir.expr<!fir.char<1,30>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_expr_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+
diff --git a/flang/test/Lower/HLFIR/max.f03 b/flang/test/Lower/HLFIR/max.f03
new file mode 100644
--- /dev/null
+++ b/flang/test/Lower/HLFIR/max.f03
@@ -0,0 +1,16 @@
+
+subroutine max_char(c1, c2, c3)
+  character(*) :: c1, c2, c3
+  c1 = max(c2,c3)
+end subroutine
+
+subroutine concat_2(c1, c2, c3)
+  character(*) :: c1(100)
+  character :: c2(100)*10, c3(100)*20
+  c1(1) = max(c2(1),c3(1))
+end subroutine
+
+subroutine concat3(c1, c2, c3, c4)
+  character(*) :: c1, c2, c3, c4
+  c1 = max(c2, c3, c4)
+end subroutine
\ No newline at end of file