Unveiling the Significance of the 'params' Keyword

In programming, the 'params' keyword serves a crucial purpose in function or method declarations. While it might seem redundant initially, removing it can have significant implications on how the code functions.

Consider the following example:

static public int addTwoEach(params int[] args)
{
    int sum = 0;
    foreach (var item in args)
        sum  = item   2;
    return sum;
}

With the 'params' keyword, this method can accept a variable number of integer arguments. For instance, you can call it as follows:

addTwoEach(1, 2, 3, 4, 5);

If you remove the 'params' keyword:

static public int addTwoEach(int[] args)
{
    int sum = 0;
    foreach (var item in args)
       sum  = item   2;
    return sum;
}

You can no longer pass individual integers as arguments. Instead, you must provide an array:

addTwoEach(new int[] { 1, 2, 3, 4, 5 });

In summary, the 'params' keyword allows you to create flexible functions or methods that can accept a varying number of arguments, making them more efficient and versatile. Additionally, it enables the use of a concise shortcut when calling these functions or methods.