Program that Defines a Function to Add First n Numbers

Question

Write a program that defines a function to add first n numbers using C programming

Answer 1

Prime Number Evaluation Using Function

In this program we are going to evaluate if a number is prime number or not using functions in C programming.

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Example :

#include<stdio.h> #include<conio.h> //Declaration of prime funtion int prime(int x); void main() { int x; clrscr(); //Taking number from the user to check if it's prime or not printf("\nEnter a number:"); scanf("%d",&x); //calling prime number for true of false if(prime(x)) printf("\nNumber is Prime"); else printf("\nNumber is not prime"); getch(); } //Definition of prime function int prime(int n) { int checkprime=0,i; for(i=2;i<n;i++) { if(n%i==0) checkprime=1; } if(checkprime==0) return 1; else return 0; }

Output :

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