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scratchyourbrain/C Program to Check Whether a Number is Prime or Not

Created December 24, 2014 05:39
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  1. scratchyourbrain created this gist Dec 24, 2014.
    20 changes: 20 additions & 0 deletions C Program to Check Whether a Number is Prime or Not
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,20 @@
    #include <stdio.h>
    int main()
    {
    int n, i, flag=0;
    printf("Enter a positive integer: ");
    scanf("%d",&n);
    for(i=2;i<=n/2;++i)
    {
    if(n%i==0)
    {
    flag=1;
    break;
    }
    }
    if (flag==0)
    printf("%d is a prime number.",n);
    else
    printf("%d is not a prime number.",n);
    return 0;
    }