Function with Default Argument

Function with default Argument

Function with default argument is used when user does not provide the argument then the default argument will be used.

Syntax:

return type functionName(datatype varName1, datatype varName2=value,..)

{

                Statements;

}

 

Example

Write a Program to show the Use of Function with default Argument. 

#include <iostream>

using namespace std;

void display(int id, string name, string city="Delhi")

{

    cout<<"\nEmployee's Details!!\n";

    cout<<"\n Welcome "<<name<<" your Id is "<<id<<" and City is " <<city;

}

int main()

{

    int i;

    string n,c;

    cout<<"Enter the Id: ";

    cin>>i;

    cout<<"Enter the name: ";

    cin>>n;

    cout<<"Enter the City: ";

    cin>>c;

    // Here # arguments passed to the function 

    display(i,n,c);

    

    //It will print the default value for the City

    display(i,n);

    return 0;

}

Output