Why we use function in C?

Functions are used for dividing a large code into module, due to this we can easily debug and maintain the code. For example if we write a calculator programs at that time we can write every logic in a separate function. Any function can be called many times.

Advantages of Function

• Code Reusuability
• Develop an application in module format
• Easy to debug the program
• Code optimization: no need to write a lot of code
• Code is easier to read
• Program testing becomes easier
• Compiled executable is smaller
• You don't need to make comments because function name make sense
• Program can be developed in short period of time
• There is no chance of code duplication