![]() ![]() The execution of the program always starts from the main function and ends with the main function. Every program must have at least one function with the name main. The C program is made of one or more pre-defined/ user-defined functions. Hence C is a function-oriented programming language. In C a big program divided into several small subroutines/functions/procedures. The function is a small program that is used to do a particular task. For example, the main is a function and every program execution starts from the main function in C programming. Similarly, 9 is not a prime number because it has more than 2 factors that are 1,3, and 9.Ī function is a block of code that performs a specific task. In this post, we will write a C program to find the prime number using a function and find all prime numbers in a given range.Ī natural number that has only two factors ( 1 and itself ) is called a prime number. For example- 5 is a prime number because it has only two factors 1 and 5. Previously we developed a C program to check whether the given number is a prime number or not? Now, we will do the same but using a function.
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