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return command in functions


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Return is what the function gives back to the caller.When you call a function and assign it to a variable the return value is what the variable will contain.

function sum(a,  {    return (a + ;}var X = sum(5, 3);alert(X) // Displays "8"

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If you create variables within a function, but don't use the var keyword, those variables will be globally visible. Example:

function foo () {	 x = 5;}alert (x); // alerts "5"

Usually this practice is discouraged because it is hard to keep track of globals created this way. The following is better:

function foo () {	 var x = 5;	 return x;}alert (foo() ); // alerts "5"

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