Another tenet of functional programming philosophy is not to modify data outside the function. In practice, this means to avoid modifying the input arguments to a function. Instead, the return ...

Procedures perform a specific task but do not return a value. Functions manipulate data and return a value to the main program. A local variable is a variable that is used in one specific section ...

But it seems strange that programming languages were not designed to support multiple return values in a more "natural" way. Because functions are mathematical constructs which perform a ...

Key fact Procedures perform a specific task but do not return a value. Functions manipulate data and return a value to the main program.