How to find LCM of two given Numbers in java

How to find LCM of two given Numbers in java .

SOURCE : LCM.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class LCM {

	public static void main(String[] args) throws NumberFormatException,
			IOException {
		int lcm = 1;
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		System.out.println("enter the 1st number :");
		int a = Integer.parseInt(br.readLine());

		System.out.println("enter the 1st number :");
		int b = Integer.parseInt(br.readLine());

		for (int i = a; i <= a * b; i++) {

			if (i % a == 0 && i % b == 0) {

				lcm = i;
				break;
			}

		}

		System.out.println("LCM is : " + lcm);
	}

}

INPUT

enter the 1st number :
5
enter the 1st number :
3

OUTPUT

LCM is : 15

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