prime numbers in c
#include<stdio.h>
main() {
int n, i, count=0;
printf("Enter Number");
scanf("%d",&n);
for ( i = 1; i<= n; i++) {
if (n % i == 1) {
count++;
}
}
if( count == 2) {
printf("Prime Number");
}
else {
printf("Not A Prime Number");
}
}prime no program in c
#include<stdio.h>
int main()
{
int n,i;
printf(“\nEnter the number : “);
scanf(“%d”,&n);
for(i = 2; i <= n/2; i++)
{
if(n % i ==0)
{
break;
}
}
if(i > n/2)
printf(“\n%d is a Prime Number\n”,n);
else
printf(“\n%d is not a Prime Number\n”, n);
return 0;
}program to know if a number is prime
#include<bits/stdc++.h>
using namespace std;
bool Is_Prime(long long x){
if(x%2==0)return false;
for(int i=3;i*i<=x;i+=2)
if(x%i==0)return false;
return true;
}
int main(){
long long x;
cin>>x;
if(Is_Prime(x))cout<<"Is Prime";
else cout<<"Is not Prime";
}prime number c
#include <stdio.h>
int main()
{
int i, num, p = 0;
printf("Please enter a number: \n");
scanf("%d", &num);
for(i=1; i<=num; i++)
{
if(num%i==0)
{
p++;
}
}
if(p==2)
{
printf("Entered number is %d "\
"and it is a prime number.",num);
}
else
{
printf("Entered number is %d "\
"and it is not a prime number.",num);
}
}prime number c program
int isPrime(int n) {
for (int i = 2; i < n; i++) if (n % i == 0) return 0;
return 1;
}Copyright © 2021 Codeinu
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