JavaScript Looping
Looping statements in JavaScript are used to execute
the same block of code a specified number of times.
Examples
For loop How to write a For loop. Use a For
loop to run the same block of code a specified number of times
Looping through HTML headers How to use the For
loop to write the HTML headers.
While loop How to write a While loop. Use a
While loop to run the same block of code while or until a condition
is true
Do while loop How to write a Do While loop. Use
a Do While loop to run the same block of code while or until a
condition is true. This loop will always be executed once, even if
the condition is false, because the statements are executed before
the condition is tested
Looping
Very often when you write code, you want the same block of code
to run a number of times. You can use looping statements in your
code to do this.
In JavaScript we have the following looping statements:
- while - loops through a block of code while a condition
is true
- do...while - loops through a block of code once, and
then repeats the loop while a condition is true
- for - run statements a specified number of times
while
The while statement will execute a block of code while a
condition is true..
while (condition)
{
code to be executed
} |
do...while
The do...while statement will execute a block of code once, and
then it will repeat the loop while a condition is true
do
{
code to be executed
}
while (condition) |
for
The for statement will execute a block of code a specified number
of times
for (initialization; condition; increment)
{
code to be executed
} |
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