Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Math Expressions | First Acquaintance
Introduction to PHP
course content

Course Content

Introduction to PHP

Introduction to PHP

1. First Acquaintance
2. Variables and Data Types
3. Conditional Statements
4. Arrays
5. Loops

bookMath Expressions

We also can write math expressions. The sequence of actions will work the same as in mathematics, where 2 + 2 * 2 = 6, because the multiplication is done before the addition.

php

main

copy
123
<?php echo 2 + 2 * 2; ?>

Let's look at a more complex example:

php

main

copy
123
<?php echo (12 + 6) * 2 - 10 / 5 + 2; ?>

First, in the expression (12 + 6) * 2 - 10 / 5 + 2, we perform the operations inside the parentheses. Adding 12 and 6 gives us 18. So, the expression now looks like 18 * 2 - 10 / 5 + 2.

Next, according to the rules of operator precedence, we handle multiplication and division from left to right. First, we calculate 18 * 2, which equals 36. Then, we compute 10 / 5, which equals 2. Thus, our expression transforms into 36 - 2 + 2.

Moving forward, we perform subtraction: 36 - 2, resulting in 34. Finally, we add 2 to 34, giving us the final result of 36.

Therefore, the expression (12 + 6) * 2 - 10 / 5 + 2 evaluates to 36.

Consider the following PHP expression:

Consider the following PHP expression:

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 5
some-alt