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# Prime number program in c

Prime Number is a number which divisible by 1 and own so we called the number is prime. The condition is number is greater than 1. A number is divisible by itself or 1 so called the prime number.

``````// Method 1: To check given number is prime or not c program.
#include<stdio.h>

int main()
{
int n;
printf("Enter the number : ");
scanf("%d", &n);
int count = 0;
if(n==1){
count = 1;
}
for(int i=2; i<n; i++){
if(n%i==0){
count++;
}
}

if(count==0){
printf("%d is prime", n);
}
else{
printf("%d is not prime", n);
}
return 0;

}``````
``````// Method 2: To check the given number is prime or not c program.

#include<stdio.h>

int main()
{
int n;
printf("Enter the number : ");
scanf("%d", &n);
int count = 0;
int flag = 0;
if(n==1){
flag = 1;
}
for(int i=2; i<=n/2; i++){
if(n%i==0){
flag = 1;
}else{
count++;
}
}

if(flag==0){
printf("%d is prime", n);
}
else{
printf("%d is not prime", n);
}

return 0;
}
``````
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