# PHP Program to Check Odd Number

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## What are Odd Numbers?

An integer (never a fraction) that cannot be divided exactly by 2. For example, 3 is an odd number, i.e., 3 % 2 = 1 (not zero).

Note: % is a Modulus (Division Remainder) operator, it finds the remainder after division of one number by another. Please check our Arithmetic Operators for more details.

Tips: It is recommended to use our online Odd Numbers calculator for better understanding.

## Using For Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using for loop.

### Example

PHP Compiler
<?php \$start = 10; \$end = 25; echo "Odd numbers between \$start and \$end: <br>"; for(\$start=\$start; \$start<=\$end; \$start++) { if(\$start % 2 != 0) echo "\$start "; } ?>

## Using While Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using while loop.

### Example

PHP Compiler
<?php \$start = 10; \$end = 25; echo "Odd numbers between \$start and \$end: <br>"; while(\$start <= \$end) { if(\$start % 2 != 0) echo "\$start "; \$start++; } ?>

## Using do while Loop

In the following example, we will find all the Odd Numbers between 10 and 25 using do while loop.

### Example

PHP Compiler
<?php \$start = 10; \$end = 25; echo "Odd numbers between \$start and \$end: <br>"; do{ if(\$start % 2 != 0) echo "\$start "; \$start++; }while(\$start <= \$end); ?>