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check whether a number is prime or not in c

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Matt Stoner answered on March 25, 2021 Popularity 8/10 Helpfulness 2/10

answer check whether a number is prime or not in c

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check whether a number is prime or not in c

Comment

int n=7,i,flag=0;
	for(i=2;i<n/2;i++){
		if(n%i==0){
			flag=1;
			break;
		}
	}

	if(flag==0){
	printf("Prime number");

	}else{
		printf("not prime number");
	}

Popularity 8/10 Helpfulness 2/10 Language c

Source: Grepper

Tags: c

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Contributed on Sep 12 2022

Matt Stoner

0 Answers Avg Quality 2/10

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Prime Number Check Program in C

Comment

#include <stdio.h> 

main() {
  int n, i, c = 0;
  printf("Enter any number n:");
  scanf("%d", &n);

  //logic
  for (i = 1; i <= n; i++) {
      if (n % i == 0) {
         c++;
      }
  }

  if (c == 2) {
  printf("n is a Prime number");
  }
  else {
  printf("n is not a Prime number");
  }
  return 0;    
}
Program Output:

Popularity 10/10 Helpfulness 7/10 Language c

Source: www.w3schools.in

Tags: c

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Contributed on Jan 01 2022

Repulsive Rattlesnake

0 Answers Avg Quality 2/10

check prime number or not c

Comment

#include <stdio.h>

int main() {

  int n, i, flag = 0;
  printf("Enter a positive integer: ");
  scanf("%d", &n);


  if (n == 0 || n == 1)
    flag = 1;

  for (i = 2; i <= n / 2; ++i) {


    if (n % i == 0) {
      flag = 1;
      break;
    }
  }

  // flag is 0 for prime numbers
  if (flag == 0)
    printf("%d is a prime number.", n);
  else
    printf("%d is not a prime number.", n);

  return 0;
}

Popularity 9/10 Helpfulness 5/10 Language c

Source: Grepper

Tags: c

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Contributed on Apr 23 2022

SaadMakhdoom

0 Answers Avg Quality 2/10

check if prime c

Comment

int isPrime(int n) {
    if (n < 2) return 0;
    for (int i = 2; i <= n / 2; i++)
        if (n % i == 0) return 0;
    return 1;
}

Popularity 10/10 Helpfulness 4/10 Language c

Source: Grepper

Tags: c

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Contributed on Mar 25 2021

Palsmo

0 Answers Avg Quality 2/10

check whether a number is prime or not in c

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check whether a number is prime or not in c

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check prime number or not c

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