Math 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.

main.php


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

Let's look at a more complex example:

main.php


              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.

Tudo estava claro?

Obrigado pelo seu feedback!

Seção 1. Capítulo 5

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Conteúdo do Curso

Introduction to PHP

1. First Acquaintance

Features of the PHP Language First Application Comments in PHP Basic Math Operations Math Expressions

2. Variables and Data Types

Data Types Variables Strings Boolean Comparison Operations

3. Conditional Statements

If Statement Else Statement Else If Statement Switch-Case Statement

4. Arrays

Creating Arrays Indexes Associative Arrays Adding and Removing Elements in Arrays

5. Loops

Loops Concept While-Loops Do-While For-Loops Increment and Decrement

Math 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.

main.php


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

Let's look at a more complex example:

main.php


              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.

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.

Tudo estava claro?

Obrigado pelo seu feedback!

Seção 1. Capítulo 5