You nest an if statement by using one within another if statement. This behavior is achieved by using what is called “nested if statements”. Sometimes you will want to run an if statement in JavaScript only if the first one was true. if (condition) Using Nested If Statements in JavaScript The JavaScript if statement allows you to run a code block when the condition you specify is true.īelow you can see the general syntax for using the if statement within JavaScript.

Let us start this guide off with the most basic conditional statement that you should learn, the if statement. Using Nested If Statements in JavaScript.Example of Writing the if, else if, else Conditional Statement.The JavaScript if…else if…else Conditional Statement.Example of using the if else if Statement.Using the if…else if Conditional Statement in JavaScript.Example of Using The if else Conditional Statement.

JavaScript if…else Conditional Statement.Example of Writing an if Statement in JavaScript.Over the next few sections, we will touch on the the following conditional statements in JavaScript: “ if“, “ if.else“, “ if.else if“, “ if.else if.else“. A value is considered “ truthy” whenever its value is not false, undefined, null, 0, -0, NAN, or an empty string ( ''). For example, “ 1 = 1” is a statement that is “ truthy“, whereas “ 1 = 2” is a statement that is “ falsy“.ĭon’t get confused between a Boolean “ true” and false” and “ truthy” and “ falsy“. The specified condition needs to be truthy for a statement to be run. For example, it allows you to write dynamic code that reacts to elements on a page or user input.

These are a crucial part of JavaScript as it allows you to perform different actions when a condition has been met. In JavaScript, a conditional statement allows you to perform an action when a particular condition is considered truthy.

Javascript if else