When a return statement is used in a function body, the execution of the function is stopped. If specified, a given value is returned to the function caller. For example, the following function returns the square of its argument, x , where x is a number. If the value is omitted, undefined is returned instead.
Where is return used?
A return statement ends the execution of a function, and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can return a value to the calling function. For more information, see Return type.
What is the difference between return and console log?
return is a statement that allows a function to output a value back to where it was called. console. log is a function that lets us inspect values for debugging purposes.
What is the difference between return and return value?
RETURN [ return-value ]. The return-value must be a character value, either a literal or an expression. … If the called procedure doesn’t return a value, then the value returned is either the empty string (“”) or, if an earlier procedure RUN statement in the same call stack returned a value, then that value is returned.
What is return in coding?
When should I use return?
return is used to send a value back to where’s it’s called from. You use it if you want to return a value. If you don’t have a return statement, it’s the same as return undefined .
Do I need return in function?
NO, a function does not always have to have an explicit return statement. If the function doesn’t need to provide any results to the calling point, then the return is not needed.
The in operator returns true if the specified property is in the specified object or its prototype chain.
How does a function return a value?
To return a value from a function, you must include a return statement, followed by the value to be returned, before the function’s end statement. If you do not include a return statement or if you do not specify a value after the keyword return, the value returned by the function is unpredictable.
What is it called when a function returns a function?
In mathematics and computer science, a higher-order function is a function that does at least one of the following: takes one or more functions as arguments (i.e. procedural parameters), returns a function as its result.