Question

write Java program for to enter a number and check that number is prime or not

Answer 1

public class Prime { public static void main(String[] args) { int num = 33, i = 2; boolean flag = false; while(i <= num/2) { // condition for nonprime number if(num % i == 0) { flag = true; break; } ++i; } if (!flag) System.out.println(num + " is a prime number."); else System.out.println(num + " is not a prime number."); } }

Answer 2

Heya,
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Here is your answer↓↓↓↓↓

class prime
{
public static void main(int n)
{
int c=0;
for(int i = 1; i<=n; i++)
{   
 if(n%i==0) 
  c= c+1;
}
if(c==2) 
System.out.println("it is prime");
else
System.out.println("it is composite");}}

Then enter the value and you will get to know .
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ANKIT