Preview:
#include <stdio.h>

int main() {
    int n;
    printf("enter the number : ");
    scanf("%d",&n);
    int isPrime=1;
    for(int i=2; i<sqrt(n); i++){
        if(n%i==0){
            isPrime=0;
        }
    }
    if(isPrime){
        printf("prime");
    }
    else{
        printf("not prime");
    }
    
    return 0;
}
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