Difference between Var, Let and Const

When ES2016 was introduced, it had two new ways of defining variables called let and const. Earlier, in JavaScript you could only define variables using var. Var var is function-scoped or globally scoped. var which is declared outside of the function-scope is available to use by the entire web page. Function-scope means when declared inside […]

A Guide To Operators In JavaScript

An operator performs operation on one or multiple values and build result. There are 5 categories of operators. Comparison Operators Arithmetic Operators Assignment Operators Conditional Operators Logical Operators Comparison Operators This list of operators always requires two operands and returns a boolean value as the result. Operators Description == equal to === matches value and […]

null Vs undefined in JavaScript

It is very important to know that both are data types in JavaScript. Null is an assigned value to the variable whereas undefined is a variable which is declared but its value has not been assigned. When you do not declare the value, JavaScript assigns the value “undefined”. Let’s talk about the similarities between null […]

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