Iterative Statements in JavaScript | For, While, and Do while loop in JavaScript
In this video, we'll be exploring the different iterative statements in JavaScript. We'll be looking at the for loop, while loop, and do while loop statements.
By the end of this video, you'll have a better understanding of how these statements work and be able to use them to make your code more readable and easy to understand.
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Loops are handy, if you want to run the same code over and over again, each time with a different value.
JavaScript supports different kinds of loops:
for - loops through a block of code a number of times
for/in - loops through the properties of an object
for/of - loops through the values of an iterable object
while - loops through a block of code while a specified condition is true
do/while - also loops through a block of code while a specified condition is true
The for statement creates a loop with 3 optional expressions:
for (expression 1; expression 2; expression 3) {
// code block to be executed
}
Expression 1 is executed (one time) before the execution of the code block.
Expression 2 defines the condition for executing the code block.
Expression 3 is executed (every time) after the code block has been executed.
The While Loop
The while loop loops through a block of code as long as a specified condition is true.
Syntax
while (condition) {
// code block to be executed
}
The do...while statements combo defines a code block to be executed once, and repeated as long as a condition is true.
The do...while is used when you want to run a code block at least one time.
