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Function overloading and return type

  • Difficulty Level : Basic
  • Last Updated : 03 Sep, 2018

In C++ and Java, functions can not be overloaded if they differ only in the return type.

For example, the following program C++ and Java programs fail in compilation.

C++ Program

int foo() { 
    return 10; 
char foo() {  // compiler error; new declaration of foo()
    return 'a'
int main()
    char x = foo();
    return 0;

Java Program

// filename
public class Main {
    public int foo() {
        return 10;
    public char foo() { // compiler error: foo() is already defined
        return 'a';
    public static void main(String args[])

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