Skip to main content

Program to check whether a number is prime or not.

#include<stdio.h>
void main(){
    int num,counter,countf=0;
    printf("Enter a Number.\n");
    scanf("%d",&num);
    counter=1;
    while(counter<=num){
        if(num%counter==0)
        countf=countf+1;
        counter++;
        }
   if(countf==2)
    printf("Prime.\n");
   else
     printf("Not Prime.");
  } 
Labels:

Comments

Post a Comment

Popular posts from this blog

Swapping two numbers without using third variable

#include<stdio.h>  int main(){       int a,b;       printf("\n Enter value for A=");       scanf("%d",&a);       printf("\n Enter value for B=");       scanf("%d",&b);       a=b-a;       b=b-a;       a=a+b;       printf("New values ....");       printf("A=%d\n",a);       printf("B=%d\n",b);       return 0; } 
Post a Comment
Read more

Program to check a number is Palindrome or not

#include<stdio.h> int palindrome(int num){ int num1 = num,id,rev; while(num>0){ id = num%10; rev = rev*10+id; num = num/10; } if(rev==num1){ printf("palindrome\n"); } else{ printf("not palindrome\n"); } return 0; } int main(){ int x; printf("Enter the number  to check palindrome\n"); scanf("%d",&x); palindrome(x); }
Post a Comment
Read more