prime check in c
int isPrime(long long number) {
if (number == 0 || number == 1 || (number % 2 == 0 && number > 2)) {
return 0;
}
else {
for (long long i=3; i <= (long long)sqrt(number)+1; i++) {
if (number % i == 0) {
return 0;
}
}
return 1;
}
}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");
}
}c program to check prime number using for loop
#include <stdio.h>
int main() {
int n, i, flag = 0;
printf("Enter a positive integer: ");
scanf("%d", &n);
for (i = 2; i <= n / 2; ++i) {
// condition for non-prime
if (n % i == 0) {
flag = 1;
break;
}
}
if (n == 1) {
printf("1 is neither prime nor composite.");
}
else {
if (flag == 0)
printf("%d is a prime number.", n);
else
printf("%d is not a prime number.", n);
}
return 0;
}prime number c program
int isPrime(int n) {
for (int i = 2; i < n; i++) if (n % i == 0) return 0;
return 1;
}c program to check prime number
//program to find prime number or not using c programming
#include<stdio.h>
#include<conio.h>
// program starts from here after main() function
void main(){
int n;
int i,count =0;
// count is incremented when the loop is true.
printf("Enter the number\n");
scanf("%d",&n);
for (i=1; i<=n; i++){
if(n%i==0){
count++;
}
}
// for the prime number the no of count is 2
// number is divided by 1 or itself(given number) so count ==2
if(count ==2){
printf("%d is prime number.\n",n);
}
// for the composite number the number is divided by more than 2 number.
else{
printf("%d is not prime number\n",n);
}
getch();
}c program to check prime number
//program to find prime number or not using c programming
#include<stdio.h>
#include<conio.h>
void main(){
int n;
int prime=1;
printf("Enter the number\n");
scanf("%d",&n);
for (int i= 2; i<n; i++){
if(n%i==0){
prime=0;
break;
}
}
if(prime==0 ){
printf(" %d is not prime number.\n",n);
}
else{
printf(" %d is prime number\n",n);
}
getch();
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
