PHP Numbers & Math

Integers, floats and math functions.

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PHP numbers are int or float. Useful functions:

is_int(), is_float(), is_numeric()
round(), ceil(), floor(), abs()
max(), min(), sqrt(), pow(), pi()
rand(1, 6) / random_int(): random numbers
intdiv() and %: integer division and remainder
number_format(): format with thousands separators

Key Takeaways: PHP Numbers & Math

Mastering PHP Numbers & Math helps you write clean and reliable PHP code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

PHP Numbers & Math Code Example

PHP

<?php
echo round(3.567, 2) . "<br>";
echo max(4, 19, 7) . " " . min(4, 19, 7) . "<br>";
echo sqrt(81) . "<br>";
echo intdiv(17, 5) . " remainder " . 17 % 5 . "<br>";
echo number_format(2500000) . "<br>";
var_dump(is_numeric("12.5"));

Output

3.57
19 4
9
3 remainder 2
2,500,000
bool(true)

Run this example on your own computer. The "Get Started" lesson shows how to set it up.

PHP Numbers & Math Practice Exercises

Check what you learned in “PHP Numbers & Math”.

/ 2 solved

Fill in the blank

Round 3.567 to 2 decimals.

echo (3.567, 2);

✓ Correct! Not quite. Try again.

Multiple choice

Which function formats 2500000 as "2,500,000"?

number_format() format() money() intval()

✓ Correct! Not quite. Try again.

to save your exercise progress.

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PHP Numbers & Math

💡 Key Takeaways: PHP Numbers & Math

PHP Numbers & Math Code Example

PHP Numbers & Math Practice Exercises

Key Takeaways: PHP Numbers & Math