Control structures (e.g. loops, conditionals) in JavaScript

Ashish Kasama|December 4, 2022|4 Minute read|
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Control structures are programming constructs that allow developers to control the flow of their code. In JavaScript, there are several control structures that can be used to create loops and conditional statements.

One of the most common control structures in JavaScript is the for loop. A for loop allows developers to repeat a block of code a specified number of times. For example:

for (var i = 0; i < 10; i++) {
console.log(i);
}

This for loop will execute the code inside the curly braces 10 times, with the variable "i" starting at 0 and incrementing by 1 each time. The loop will stop when "i" is no longer less than 10.

Another common control structure in JavaScript is the while loop. A while loop allows developers to repeat a block of code as long as a certain condition is true. For example:

var x = 0;
while (x < 10) {
console.log(x);
x++;
}

This while loop will execute the code inside the curly braces until the variable "x" is no longer less than 10. The variable "x" is incremented by 1 each time the loop executes.

In addition to loops, JavaScript also has several conditional statements that allow developers to execute different blocks of code depending on whether a certain condition is true or false. The most common conditional statement is the if statement. For example:

var x = 10;
if (x > 5) {
console.log("x is greater than 5");
}

In this example, the code inside the curly braces will only be executed if the condition (x > 5) is true.

JavaScript also has an if-else statement, which allows developers to specify a block of code to execute if the condition is true and a different block of code to execute if the condition is false. For example:

var x = 10;
if (x > 5) {
console.log("x is greater than 5");
}
else {
console.log("x is not greater than 5");
}

Control structures like loops and conditional statements are essential tools for any JavaScript developer. They allow you to create complex and dynamic applications by controlling the flow of your code.

Check out the rest of our series on Javascript by reading our other articles:

     
    Ashish Kasama

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