How to Print Prime Numbers From 1 To 100 In Java

A prime number is a number only divisible by 1 or by itself. For example, 3 is only divisible by 3 or by itself. Other prime numbers 2, 3, 5, 7, 11, 13, 17….

Note: 0 and 1 are not prime numbers. 2 is the only even prime number.
 

Program to print prime numbers from 1 to 100 in Java :

public class PrimeNbr100 {
   public static void main(String args[]){

      for(int i = 2; i<=100;){
         int prime = 1;
         for(int loop = 2; loop <=i; loop++) {
            if((i % loop) == 0 && loop!=i) {
               prime = 0;
            }
         }
         if (prime != 0){
            System.out.println(i+" is a prime number");
            i++;
         }
         else
         i ++;
      }
   }
}

Output:

2 is a prime number
3 is a prime number
5 is a prime number
7 is a prime number
11 is a prime number
13 is a prime number
17 is a prime number
19 is a prime number
23 is a prime number
29 is a prime number
31 is a prime number
37 is a prime number
41 is a prime number
43 is a prime number
47 is a prime number
53 is a prime number
59 is a prime number
61 is a prime number
67 is a prime number
71 is a prime number
73 is a prime number
79 is a prime number
83 is a prime number
89 is a prime number
97 is a prime number

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