This means that and but that is not very useful if a compound expression has several implications in it. There are only six falsy values in JavaScript - false, null, undefined, NaN, 0, and '' - and everything else is truthy. Note that this doesn’t mean that they always return a boolean from the operation. if statements, &, ||, and ternary conditions all coerce values into booleans.

Since JavaScript is loosely typed, it coerces values into booleans in logical expressions. Enjoy! Truthy & Falsy values in JavaScriptīefore studying logical expressions, let’s understand what’s “truthy” in JavaScript. It’s long but I hope it is as beneficial to you as it has been to me. I’d like to share this knowledge, so I wrote this article. Often I have turned a complex combination of ampersands, pipes, exclamation marks, and equals signs into something simpler and much more readable. It’s not statistics or calculus that I use but, rather, my thorough understanding of Boolean logic.

I rely on my mathematical training daily in writing code. To learn more, visit JavaScript switch.I am a front-end engineer and mathematician. If you need to make a choice between more than one alternatives based on a given test condition, the switch statement can be used. To learn more, visit JavaScript Ternary Operator. In certain situations, a ternary operator can replace an if.else statement.

For example, you can replace const number = 2 Ĭonsole.log('The number is negative or zero.') The syntax of the if statement is: if (condition) in our programs. In JavaScript, there are three forms of the if.else statement. In such situations, you can use the JavaScript if.else statement to create a program that can make decisions. For example, assigning grades A, B or C based on marks obtained by a student. In computer programming, there may arise situations where you have to run a block of code among more than one alternatives.

Javascript conditional statement