How to write a C Program to Detection of a Prime Number in C Programming Language ?
Write a program to determine whether a number is prime or not.Note :A prime number is one, which is divisible only by 1 or itself.
- #include<stdio.h>
- main()
- {
- int num, i;
- printf ("Enter a number:");
- scanf ("%d", &num);
- i=2;
- while (i<=num - 1)
- {
- if (num % i ==0)
- {
- printf ("Not a prime number");
- break;
- }
- i++;
- }
- if (i == num)
- printf ("Prime Number");
- }