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. In today's article, Toptal developer Daniel Angel Muoz Trejo shows us. While many high-level languages have surpassed C in usage for certain applications, the C programming language remains unrivaled for software that must harness the true power of the machine. It becomes really simple to read and use the code if the code is divided into functions. C is one of the oldest programming languages around. 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.
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