Write a C Program to Find Whether the Given Number is Prime Number or not.
#include<stdio.h>
int main()
{
int a,i,count=0; //’a’ is user defined number, ‘i’ for iteratiions, ‘count’ for counting factor of given number.
printf(“Enter a number :”);
scanf(“%d”,&a);
for(i=1;i<=a;i++)
{
if(a%i==0) //check the iteration value is factor of given number or not.
count++;
}
if(count==2) //Every prime number should have only two factors.
printf(“Given number is PRIME number\n”);
else
printf(“Given number is Non-PRIME number\n”);
return 0;
}
Output :
i) Enter a number : 28541
Given number is PRIME number
ii)Enter a number : 30857
Given number is Non-PRIME number
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Task : Write a c program to print nth prime number.
