Below are an example of function declarations. Putting parameter names in function declaration is optional in the function declaration, but it is necessary to put them in the definition. For example, we can use library functions without worrying about their internal working.Ī function declaration tells the compiler about the number of parameters function takes, data-types of parameters, and return type of function. It becomes really simple to read and use the code if the code is divided into functions. Consider a big file having many lines of code. This also helps in maintenance as we have to change at one place if we make future changes to the functionality. If functionality is performed at multiple places in software, then rather than writing the same code, again and again, we create a function and call it everywhere. Functions help us in reducing code redundancy. Researchers tracked thousands of posts denying climate change - and only 8 were marked as.
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