Why to use params Keyword ?

if you make a function or a method that's using params, when you remove params the code will still work perfectly, So whats the difference between them ? Lets have a look.

With params:

public static int sumIntegers(params int[] args)
{int sum = 0;

foreach (int element in args){

sum = sum + element;

}

return sum;

}
 

Without params:

public static int sumIntegers(int[] args){

int sum = 0;

foreach (int element in args){

sum = sum + element;

}

return sum;

}

Answer

With params you can call your method like this:

sumIntegers(1, 2, 3, 4, 5, 6, 7, 8, 9);

Without params, you can’t.

Additionally, you can call the method with an array as a parameter in both cases:

sumIntegers(new int[] {1, 2, 3, 4, 5, 6, 7, 8, 9});

That is, params allows you to use a shortcut when calling the method.