Table of 2 using while loop in php

While loop in PHP is very simple and similar to while loop in C programming. In PHP while loop the condition is checked at the beginning of the loop and the statement inside is executed till the end of the loop, then again the condition is checked and loop executed. Like this loop is continued till the condition became false and  the loop is then stopped.

while[condition checked]{
code part to execute 
}

Here if the condition became false inside the loop then also the loop continue to execute till the next time the condition is checked.  Here is one simple example of while loop.

What is the output of this?

value of $j= 5
 value of $j= 6 
 value of $j= 7 
 value of $j= 8 
 value of $j= 9 

Here we are checking the while condition at the starting of the loop. So the execution of the loop will be done only if condition is satisfied at the beginning. We can read on the difference between do while loop and while loop here.

Exit inside the loop by using break

Prematurely we can come out of the loop by using break statement. We used one if condition to check the value and then apply break statement.

Using NULL

Check this code

$a=NULL;

while[$a]{
echo "hi";	
break;
}

In above code the line echo "hi"; will not be executed as NULL is same as False. This concept we will be using in database record set where pointer will return NULL when there is no more record to return.
However below code will print the output once, as we have used break; to come out of the loop after printing hi.

$a=True;

while[$a]{
echo "hi";	
break;
}

Display elements of an array by using While loop

Let us declare one array with some elements. Then by using while loop we can display the key and value of the array.

The output is here

0 > Three
1 > two
2 > Four
3 > five
4 > ten

Create [ 2 to 10 ]multiplication table using While loop

To generate multiplication tables we will start with 2 table
Here is the simple code

$i=2;
$j=1;
while[$j

Run Program

Multiplication Table in PHP using Function

Run Program

Output

----The input number is: 15

----The range number is: 12

----The above multiplication table--------

    15 * 1 = 15
    15 * 2 = 30
    15 * 3 = 45
    15 * 4 = 60
    15 * 5 = 75
    15 * 6 = 90
    15 * 7 = 105
    15 * 8 = 120
    15 * 9 = 135
    15 * 10 = 150
    15 * 11 = 165
    15 * 12 = 180