What will a function return if it does not have a return statement?

What will a function return if it does not have a return statement?

• A. Null
• B. Undefined
• C. A default value
• D. An error

Answer: (B)

In programming, when a function does not contain a return statement, it implicitly returns a special value called 'undefined' in many languages, including the context of Avaloq Script and JavaScript. This indicates that the function has completed its execution without returning any specific value to the caller. In scenarios where a function is expected to produce output but doesn't explicitly return anything, the outcome is treated as 'undefined', signifying that there is no meaningful response from the function. This behavior helps to inform developers that something may not have gone according to plan if they were expecting a particular value as a result of the function call. Having an understanding of how functions behave in the absence of a return statement is crucial when you are designing or debugging your code, as it helps you manage expectations regarding function outputs.

In programming, when a function does not contain a return statement, it implicitly returns a special value called 'undefined' in many languages, including the context of Avaloq Script and JavaScript. This indicates that the function has completed its execution without returning any specific value to the caller.

In scenarios where a function is expected to produce output but doesn't explicitly return anything, the outcome is treated as 'undefined', signifying that there is no meaningful response from the function. This behavior helps to inform developers that something may not have gone according to plan if they were expecting a particular value as a result of the function call.

Having an understanding of how functions behave in the absence of a return statement is crucial when you are designing or debugging your code, as it helps you manage expectations regarding function outputs.