How can a function return a value in node JS?

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.

Can JS function return value?

JavaScript functions can return a single value. To return multiple values from a function, you can pack the return values as elements of an array or as properties of an object.

Can a function return a variable?

A function is not required to return a variable, it can return zero, one, two or more variables.

Can a function return a number?

A function cannot return a number. What will the following function return? What will the following code output? What will the following code output?

Do you always have to return something from a 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.

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What is return in a function?

A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string. The type of value your function returns depends largely on the task it performs.

Can a return value be part of an expression?

Since return_42() returns a numeric value, you can use that value in a math expression or any other kind of expression in which the value has a logical or coherent meaning. This is how a caller code can take advantage of a function’s return value.

Does a procedure return a value?

A stored procedure does not have a return value but can optionally take input, output, or input-output parameters. A stored procedure can return output through any output or input-output parameter.

What is a function call?

A function call is an expression containing the function name followed by the function call operator, () . … The argument list can contain any number of expressions separated by commas. It can also be empty. The type of a function call expression is the return type of the function.

What does returning a variable do?

return makes the value (a variable, often) available for use by the caller (for example, to be stored by a function that the function using return is within). Without return , your value or variable wouldn’t be available for the caller to store/re-use.

What do you call a function that 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.

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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 does returning a value mean?

In simple terms, it means to return the value to caller of the method… So, in your example, the method getX would return the value of x to the caller, allowing them access to it.

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