Course Content

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

If Statement

An if statement is a construct that allows you to execute a code block if a specific condition is met.

The condition is an expression that evaluates to a bool value, which can be true or false. If the condition is true, the block of code is executed. If the condition is false, the block of code is skipped.

Syntax

The syntax of the conditional operator is so simple: if keyword, condition in the parentheses ( ) and a code block in the curly brackets { }.

The open curly bracket { } opens the code block, and the close curly bracket symbol closes it. Let's consider a example:

main


              123456
            
<?php
$num=5; 
if ($num>0) {   // 5 > 0 ?
  echo "Number is positive"; // output if it's `true` 
}    
?>

The condition was confirmed and the block of code worked. Let's consider a different example:

main


              123456
            
<?php
$num = 10; 
if ($num < 0) {   // 10 < 0 ?
  echo "Number is negative"; // output if it's `true` 
}    
?>

The condition was not confirmed, and the code block did not work.

Task

Swipe to show code editor

Complete the code to create a program that checks the price of a chocolate bar and prints the appropriate message. If the price of the chocolate bar is less than or equal to 3, the program should print "This chocolate bar has an average price". If the price of the chocolate bar is greater than 3, the program should print "This chocolate bar is expensive".

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 3. Chapter 1

If Statement

An if statement is a construct that allows you to execute a code block if a specific condition is met.

Syntax

The syntax of the conditional operator is so simple: if keyword, condition in the parentheses ( ) and a code block in the curly brackets { }.

The open curly bracket { } opens the code block, and the close curly bracket symbol closes it. Let's consider a example:

main


              123456
            
<?php
$num=5; 
if ($num>0) {   // 5 > 0 ?
  echo "Number is positive"; // output if it's `true` 
}    
?>

The condition was confirmed and the block of code worked. Let's consider a different example:

main


              123456
            
<?php
$num = 10; 
if ($num < 0) {   // 10 < 0 ?
  echo "Number is negative"; // output if it's `true` 
}    
?>

The condition was not confirmed, and the code block did not work.

Task

Swipe to show code editor

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 3. Chapter 1

Switch to desktop for real-world practiceContinue from where you are using one of the options below