Java Program to Print Even Numbers from 1 to N

Write a Java Program to Print Even Numbers from 1 to N using If Statement and Conditional Operator with example. If the given number is divisible by 2, then it is an even number.

Java Program to Print Even Numbers from 1 to N Example

This program allows the user to enter the maximum limit value. Next, this Java program prints the even numbers from 1 to the maximum limit value using For Loop and If statements.

In Java Programming, we have a % (Module) Arithmetic Operator to check the remainder. If the remainder is 0, then the number is even.

import java.util.Scanner;

public class EvenNumbers {
private static Scanner sc;
public static void main(String[] args)
{
int number, i;
sc = new Scanner(System.in);

System.out.print(" Please Enter any Number : ");
number = sc.nextInt();

for(i = 1; i <= number; i++)
{
if(i % 2 == 0)
{
System.out.print(i +"\t");
}
}
}
}

First, we used the For loop to iterate from 1 to the maximum value (Here, number = 5). As we know, if the number is entirely divisible by 2, it is an even number. So, we used the If condition to check whether the remainder of the number divided by 2 is exactly equal to 0 or not.

User entered value in this Java Program to Print Even Numbers from 1 to N : number  = 5

For Loop First Iteration: for(i = 1; i <= 5; i++)
if(i % 2 == 0) => if(1 % 2 == 0) – the For loop Condition is False

Second Iteration: for(i = 2; 2 <= 5; 2++)
if(2 % 2 == 0) – Condition is True. So, i value printed

Third Iteration: for(i = 3; 3 <= 5; 3++)
if(3 % 2 == 0) – Condition is False

Fourth Iteration: for(i = 4; 4 <= 5; 4++)
if(4 % 2 == 0) – Condition is True. So, I value printed

Fifth Iteration: for(i = 5; 5 <= 5; 5++)
if(5 % 2 == 0) – Condition is False

Sixth Iteration: for(i = 6; 6 <= 5; 6++)
Condition (6 <= 5) is False. So, the Java compiler exits from the For Loop

Java Program to Print Even Numbers from 1 to N Example 2

This program is the same as above, but we altered for loop to eliminate the If statement. If you observe the below code snippet, We started i from 2 and increment it by 2 (not 1). It means, for the first iteration, i become 2, and for the second iteration, i become 4 (not 3) so on.

import java.util.Scanner;

public class EvenNumbers1 {

private static Scanner sc;
public static void main(String[] args)
{
int number, i;
sc = new Scanner(System.in);

System.out.print(" Please Enter any Number : ");
number = sc.nextInt();

for(i = 2; i <= number; i = i + 2)
{
System.out.print(i +"\t");
}
}
}

Even numbers using for loop output

Please Enter any Number : 40
2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38	40

Java Program to Print Even Numbers from 1 to N Example 3

This program to return even numbers from 1 to 100 is the same as the second example, but we are using the While Loop.

import java.util.Scanner;

public class EvenNumbers2 {

private static Scanner sc;
public static void main(String[] args)
{
int number, i;
sc = new Scanner(System.in);

System.out.print(" Please Enter any Number : ");
number = sc.nextInt();
i = 2;

while(i <= number)
{
System.out.print(i +"\t");
i = i + 2;
}
}
}

Using a While Loop output

Please Enter any Number : 25
2	4	6	8	10	12	14	16	18	20	22	24

Java Program to Print Even Numbers from 1 to N using Method

This Java program is the same as the first example. But we separated the even number from 1 to N logic and placed it in a separate method.

import java.util.Scanner;

public class EvenNumbers3 {
private static Scanner sc;
public static void main(String[] args)
{
int number;
sc = new Scanner(System.in);

System.out.print(" Please Enter any Number : ");
number = sc.nextInt();

findEven(number);
}

public static void findEven(int num)
{
int i;
for(i = 1; i <= num; i++)
{
if(i % 2 == 0)
{
System.out.print(i +"\t");
}
}
}
}
Please Enter any Number : 70
2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60	62	64	66	68	70

Java Program to Print Even Numbers between a Given Range

This Java program allows the user to enter Minimum and maximum values. Next, this program displays a list of even numbers between the minimum and maximum values.

import java.util.Scanner;

public class EvenNumbers4 {
private static Scanner sc;
public static void main(String[] args)
{
int minimum, maximum;
sc = new Scanner(System.in);

System.out.print(" Please Enter the Minimum value : ");
minimum = sc.nextInt();

System.out.print(" Please Enter the Maximum value : ");
maximum = sc.nextInt();

findEven(minimum, maximum);
}

public static void findEven(int minimum, int maximum)
{
int i;
if(minimum % 2 != 0)
{
minimum++;
}
for(i = minimum; i <= maximum; i++)
{
if(i % 2 == 0)
{
System.out.print(i +"\t");
}
}
}
}

Even numbers from 5 to 150 Output

Please Enter the Minimum value : 5
Please Enter the Maximum value : 150
6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60	62	64	66	68	70	72	74	76	78	80	82	84	86	88	90	92	94	96	98	100	102	104	106	108	110	112	114	116	118	120	122	124	126	128	130	132	134	136	138	140	142	144	146	148	150

Please refer to