C program to Prime Number

Below is C program to Prime Number.

Program: Prime Number using while loop

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/* Prime Number using while loop */   #include<stdio.h> int main() {     int a,i,f;     printf("Enter a number: ");     scanf("%d",&a);     f=0;     i=2;     while(i <= a/2)     {         if(a%i == 0)         {             f=1;             break;         }         i++;     }     if(f==0)         printf("Prime Number")     else         printf("Not Prime Number");  return 0; }

Program: Prime Number using for loop

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/* Prime number using for loop */   #include<stdio.h> int main() {     int a,i,f;     printf("Enter a number: ");     scanf("%d",&a);     f=0;     for(i=2;i <= a/2;i++)     {         if(a%i == 0)         {             f=1;             break;          }     }     if(f==0)         printf("Prime Number")     else         printf("Not Prime Number");  return 0; }