Default Parameters In C++

[Sneha Jariwala]

#62386

What are the Default Parameters? How are they evaluated in the C++ function?

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[Test]

#62387

Hello,

A default Parameter is a value provided in a function declaration that is automatically assigned by the compiler if the caller of the function doesn’t provide a value for the argument with a default value.

Let me elaborate Default parameter with One Example So you can get a better idea about it!

#include

// A function with default arguments, it can be called with
// 2 arguments or 3 arguments or 4 arguments.
int sum(int x, int y, int z=0, int w=0)
{
return (x + y + z + w);
}
int main()
{
cout << sum(10, 15) << endl;
cout << sum(10, 15, 25) << endl;
cout << sum(10, 15, 25, 30) << endl;
return 0;
}

OutPut:
25
50
80

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[Author]

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