Defining a function with arguments and a return value Optionally, the data type of the return value can also be mentioned while defining the function.
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Return value in a functionĪfter running the block of code programmatically, there may be some information that the function wants to pass back to the calling function. However, this is not mandatory.īased on the usage of the variable arguments in the code, the data type of the arguments can be assumed too.
We can define the data type of the arguments along with the variable names when defining the function. These inputs are called as “ Arguments” or “ Parameters” in programming. This data can be input in the same line as the function name. Let’s say you have some data that’s required for the block of code - the function - to programmatically run. The block of code with a function name that is called in several places is named the “Called Function” and the line of code that calls the function is the “Calling function.” Arguments in a function This will handle the change in flow wherever the function has been called. If we need to make an enhancement or modification in any flow of action which is already encapsulated in a function, we only need to make the change in one place - the function.