PHP Continue
What is continue in PHP?
Inside the loop, the continue statement is used to control the loop in preprocessor hypertext. PHP utilizes the continue keyword to implement the continue statement, which transfers the program's flow at the beginning of the loop and skips the current statement once it is reached.
- Continue is a predefined keyword in PHP.
- The continue statement can’t be used outside of the iteration loop. It only appears in iteration statements and causes the control to be passed to the starting of that loop in which it is used. To be more specific, each of the statements.
- The continue statement is used in all php control loops (for, while, and do-while).
Syntax:
The syntax of the continue statement is:
Jump statement;
continue;Explanation:
The statements within the loop are executed based on the loop condition. The continue statement skips the current statement and passes control to the next loop iteration when used inside a condition.
Flowchart:
Syntax of for loop:
In PHP, a for loop is written as
for (initialize; condition; increment)
{
statement(x);
}
Use of continue in for loop:
The continue keyword in a for loop causes control to jump to the update statement right away.
for ( , , ) {
{
// ...
continue;
}
} Syntax of the while loop:
while(condition)
{
statement(x);
}Use of Continue in while loop:
while () {
{
// ...
}
continue;
} Syntax of the Do-While loop:
Do{
statement(s);
} while(expression);Use of Continue in a do-while loop:
do ( ){
{
// ...
continue;
updation;
}
} while(,)
Let us take some examples to understand the continue statement in PHP:
Program 1: Program to print numbers:
<?php
//outer loop
for($i =1; $i<=3; $i++)
{
//inner loop
for($j=1; $j<=3; $j++)
{
if(($i == $j) )
{
continue; // it skips if both i and j are not equal
}
echo $i.$j;
echo “</br>”;
}
}
?>
The output of the program:
11
22
33
44
55
Program 2: Program to print odd numbers between 1 and 20 by using the Continue statement:
echo "Even numbers between 1 to 20: </br>";
$i = 1;
while($i<=20){
if($i%2==0){
$i++;
Continue; //it skips all even numbers
}
echo $i;
echo”</br>”;
$i++;
}
?> The output of the program:
1
3
5
7
9
11
13
15
17
19
Explanation:
We have used the while loop method in the above code to demonstrate the implementation of the continue statement.
We've set up two variables: "n" for entering the value and "i" for the iteration. The program asks the user for a number, which is then stored in variable ‘n’. We initialized i to 1(i=1) and used a condition as text expression that verifies the value of "i" is less than or equal to 20 (i<=20).
After then, we used the continue statement inside the loop to skip the even numbers with the logic (i%2==0). if the condition is true according to the logic then the number is skipped. And, if the number is not even, the statement outside if condition is executed, and the odd numbers are printed one by one.
Program 3: Program to print the numbers:
<?php
for ($i = 1; $i<=5; $i++)
{
echo "outer loop\n";
for ($j=1;$j<=5;$j++)
{
if ($j >3) continue 2;
echo "I : $i J : $j"."\n";
}
echo "End of inner loop\n";
}
?>
The Output of the program:
outer loop
i : 1 J : 1
i : 1 J : 2
i : 1 J : 3
outer loop
i : 2 J : 1
i : 2 J : 2
i : 2 J : 3
outer loop
i : 3 J : 1
i : 3 J : 2
i : 3 J : 3
outer loop
i : 4 J : 1
i : 4 J : 2
i : 4 J : 3
outer loop
i : 5 J : 1
i : 5 J : 2
i : 5 J : 3