Write a C program to chack whether a number is prime or not?
#include<stdio.h>#include<conio.h>
int main()
{
int i=2, j, flag=0;
printf("Enter a number: ");
scanf("%d",&j);
while(i<=j/2)
{
if(j%i==0)
{
printf("%d is not prime",j);
flag=1; // here, flag chakes if the condition is true
break;
}
else
{ i++; }
}
if(flag==0)
{
printf("%d is prine.",j);
}
getch();
}
Output 1:
Output 2:
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