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:

php
9
1
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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.

• 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.