prime in java
public class Prime {
public static void main(String[] args) {
int num = 29;
boolean flag = false;
for(int i = 2; i <= num/2; ++i){
if(num % i == 0){
flag = true;
break;
}
}
if (!flag)
System.out.println(num + " is a prime number.");
else
System.out.println(num + " is not a prime number.");
}}
Source:www.prograhow to check if number prime in java
public class PrimeNumberInJava
{
public static void main(String[] args)
{
int a, b = 0, flag = 0;
int number = 17;
b = number / 2;
if(number == 0 || number == 1)
{
System.out.println(number + " is not prime number");
}
else
{
for(a = 2; a <= b; a++)
{
if(number % a == 0)
{
System.out.println(number + " is not prime number.");
flag = 1;
break;
}
}
if(flag == 0)
{
System.out.println(number + " is prime number.");
}
}
}
}primenumbers java
It will display the prime numbers between 1 and 100.
class PrimeNumbers
{
public static void main (String[] args)
{
int i =0;
int num =0;
//Empty String
String primeNumbers = "";
for (i = 1; i <= 100; i++)
{
int counter=0;
for(num =i; num>=1; num--)
{
if(i%num==0)
{
counter = counter + 1;
}
}
if (counter ==2)
{
//Appended the Prime number to the String
primeNumbers = primeNumbers + i + " ";
}
}
System.out.println("Prime numbers from 1 to 100 are :");
System.out.println(primeNumbers);
}
}Copyright © 2021 Codeinu
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