For-Loops
A for
loop repeats a particular block of code multiple times. For example, if we want to check each student's grade in a class of 32 students, we loop from 1 to 32. The for
loop is used to repeat a section of code a known number of times.
Some everyday examples of using a for
loop:
- Calculating the total cost of items in a shopping cart. For instance, summing up the prices of all items in a list of purchases;
- Printing all even days in a month. For example, printing all the even days in July;
- Iterating through a guest list for a party. For example, printing the names of all guests.
Syntax
Let's look at the syntax of the for
loop using the example code below:
for (Initialization; Condition; Increment/Decrement) {
// code block
}
The for loop has three parts:
- Initialization is the process of setting the initial value of the variable i to 0.
- Condition is the condition that determines whether the loop will continue iterating, checking if i is less than 5.
- Increment or Decrement are the operations performed on the counter at the end of each loop iteration.
main.php
12345<?php for ($i = 1; $i <= 5; $i++) { echo "Iteration {$i}\n"; } ?>
-
for
loop in PHP is used to iterate a specific number of times. -
$i = 1;
- Initializes the variable$i
with a value of 1 before starting the loop. -
$i <= 5;
- Condition that is checked before each iteration. The loop continues as long as this condition is true. -
$i++
- Increment operation that increases the value of$i
by 1 after each iteration.
This code will print "Iteration 1"
through "Iteration 5"
because the condition $i <= 5
is true for values of $i
from 1 to 5.
Swipe to start coding
Fill in the blanks in the given code so that the message "Programming is fun!"
is displayed three times. Use the variable $i
as the counter for the for
loop.
Lösning
Tack för dina kommentarer!
single
Fråga AI
Fråga AI
Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal
Awesome!
Completion rate improved to 4.35
For-Loops
Svep för att visa menyn
A for
loop repeats a particular block of code multiple times. For example, if we want to check each student's grade in a class of 32 students, we loop from 1 to 32. The for
loop is used to repeat a section of code a known number of times.
Some everyday examples of using a for
loop:
- Calculating the total cost of items in a shopping cart. For instance, summing up the prices of all items in a list of purchases;
- Printing all even days in a month. For example, printing all the even days in July;
- Iterating through a guest list for a party. For example, printing the names of all guests.
Syntax
Let's look at the syntax of the for
loop using the example code below:
for (Initialization; Condition; Increment/Decrement) {
// code block
}
The for loop has three parts:
- Initialization is the process of setting the initial value of the variable i to 0.
- Condition is the condition that determines whether the loop will continue iterating, checking if i is less than 5.
- Increment or Decrement are the operations performed on the counter at the end of each loop iteration.
main.php
12345<?php for ($i = 1; $i <= 5; $i++) { echo "Iteration {$i}\n"; } ?>
-
for
loop in PHP is used to iterate a specific number of times. -
$i = 1;
- Initializes the variable$i
with a value of 1 before starting the loop. -
$i <= 5;
- Condition that is checked before each iteration. The loop continues as long as this condition is true. -
$i++
- Increment operation that increases the value of$i
by 1 after each iteration.
This code will print "Iteration 1"
through "Iteration 5"
because the condition $i <= 5
is true for values of $i
from 1 to 5.
Swipe to start coding
Fill in the blanks in the given code so that the message "Programming is fun!"
is displayed three times. Use the variable $i
as the counter for the for
loop.
Lösning
Tack för dina kommentarer!
Awesome!
Completion rate improved to 4.35single