Java Program to Print
First 100 Even and Odd Numbers

Last Updated: 14 August, 2022

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On this page, we are going to learn how to write a Java program to print first 100 even and odd number. So, let's first understand what is even and odd numbers.

In mathematics, even numbers are those which when divided by 2 leaves no remainder or as 0 while Odd numbers are those numbers that when divided by 2 leave a remainder of 1.

For example:

Even Numbers: 2, 4, 6, 8, 10....
Odd Numbers: 3, 5, 7, 9....

The sum of two even numbers or two odd numbers is an even number whereas the sum of an even and an odd number is an odd number.

Program 1: A Java Program to print first 100 Even numbers

public class FirstHundredEvenNumbers { public static void main(String[] args) { int[] evenNumbers = new int[100]; int evenIndex = 0; for (int i = 2; i <= 200; i++) { if (i % 2 == 0) { evenNumbers[evenIndex] = i; evenIndex++; } } System.out.println("First 100 Even Numbers: "); for (int i = 0; i < evenNumbers.length; i++) System.out.print(evenNumbers[i] + " "); } }

Output

First 100 Even Numbers:
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 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180 182 184 186 188 190 192 194 196 198 200

Program 2: A Java Program to print first 100 Odd numbers

public class FirstHundredOddNumbers { public static void main(String[] args) { int[] oddNumbers = new int[100]; int oddIndex = 0; for (int i = 2; i <= 201; i++) { if (i % 2 != 0) { oddNumbers[oddIndex] = i; oddIndex++; } } System.out.println("First 100 Odd Numbers: "); for (int i = 0; i < oddNumbers.length; i++) System.out.print(oddNumbers[i] + " "); } }

Output

First 100 Odd Numbers:
3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115 117 119 121 123 125 127 129 131 133 135 137 139 141 143 145 147 149 151 153 155 157 159 161 163 165 167 169 171 173 175 177 179 181 183 185 187 189 191 193 195 197 199 201