In JavaScript, a function returns a value by returning the value in the "return" statement to where the function was called. For example:
sum = add(a,b)
add(a,b) function and it executes its return statement, that returned value will be stored in the sum variable.The return statement ends function execution and specifies a value to be returned to the function caller.
Source: Mozilla, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return
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