The conditional ternary operator in JavaScript assigns a value to a variable based on some condition and is the only JavaScript operator that takes three operands. So let’s dive into the implementation layer - the glorious “if” statement and friends… If Statements. JavaScript else statement runs a block of code if the if statements condition is false. We can use the else statement with if statement to execute a block of code when the condition is false. If Statement (about) JavaScript Statements (quirksmode) JavaScript If Statements (quackit) If Statements (tizag) Output: I am Not in if if-else: The if statement alone tells us that if a condition is true it will execute a block of statements and if the condition is false it won’t.But what if we want to do something else if the condition is false. Within the Else statement, there is another if condition called Nested If. JavaScript Else If is a type of conditional statement that is used to compare different decisions. So yes, there's definitely good reasons for using else if. Switch, of course, allows for very simple comparisons only. “Else if” statements: this specifies a new test if the first condition is false. “Else” statements: where if the same condition is false it specifies the execution for a block of code. Conditional statements are among the most useful and common features of all programming languages. Javascript is an object oriented programming language, very commonly used in web design to communicate asynchronously with the Browser. This JavaScript tutorial is part of a full (and free) course to become a Full Stack Developer. The ternary operator is a substitute for an if statement in which both the if and else clauses assign different values to … If the person age is greater than or equal to 18 then first condition fails, it will check the else statement. Introduction. But avoid …. You can have as many else if statements as necessary. JavaScript if statement runs a code block if a specific set condition is true. “How To Write Conditional Statements in JavaScript” describes how to use the if, else, and else if keywords to control the flow of a program based on different conditions, which in JavaScript are often the result of user input. The Problem. In this JavaScript Nested If statement example, If the person age is less than 18 then he is not eligible to work. As part of that, there are some hands-on exercises that we put in place so that you can actually remember what you learn. @Mark To claim that there is never a reason to use "else if" is incorrect. References. Nesting if/else statements helps to organize and isolate conditions in order to avoid testing the same condition twice or to minimize the number of times various tests need to be performed. – … Asking for help, clarification, or … By using if statements with both comparison and logical operators, we can set up code that will be run if a specific combination of conditions is met. Here comes the else statement. Choosing and Writing Statements Remember, JavaScript is a language and therefore is an implementation of challenges and problems we are trying to solve. JavaScript If-Else for Full Stack Developers. Also, we have the second if’s else that sets x equal to 20, and “else and now x = ” + x is displayed on the screen. JavaScript supports two types of conditional statements namely if..else..if Please be sure to answer the question.Provide details and share your research! JavaScript else if statement runs a code block if the condition of if is false but an extra condition proves to be true. Conditional statements let you perform different actions based on varying conditions. JavaScript will attempt to run all the statements in order, and if none of them are successful, it will default to the else block. Thanks for contributing an answer to Stack Overflow! Else if statements are akin to using "switch", however it will allow for more elaborate comparisons. Now that you have the basic JavaScript conditional statement definitions, let’s show you examples of each. So now we understand the concept behind our if, else if and else decisions - let’s explore real JavaScript. In the case of many else if statements, the switch statement might be preferred for readability. Code block if the condition is false most useful and common features of programming. 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