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
if (condition) {
// code block
};
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.php
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.php
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.
Swipe to start coding
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"
.
Løsning
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If Statement
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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
if (condition) {
// code block
};
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.php
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.php
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.
Swipe to start coding
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"
.
Løsning
Tak for dine kommentarer!
Awesome!
Completion rate improved to 4.35single