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# PHP program to find the sum of odd numbers within a given range

To find the sum of odd numbers within a given range, the code is as follows −

## Example

<?php function odd_num_sum($val) { $entries = (int)($val + 1) / 2; $sum = $entries * $entries; return $sum; } function num_in_range($low, $high) { return odd_num_sum($high) - odd_num_sum($low - 1); } $low = 3; $high = 23; echo "The sum of odd natural numbers between the numbers 3 and 23 is ", num_in_range($low, $high); ?>

## Output

The sum of odd natural numbers between the numbers 3 and 23 is 141.75

A function named ‘odd_num_sum’ is defined that computes the sum of odd numbers within a specific range of numbers. The function ‘num_in_range’ gives the range of values between two numbers that are passed as parameters to this function. Outside both the function, the range values are defined and this function ‘num_in_range’ is called by passing the low and high values as parameters. Relevant output is displayed on the console.

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