You can download PDF version of this article and use it for offline purposes as per citation note. Please download the PDF version here:Difference Between null and undefined in JavaScript Reference: 1.tutorialspoint.com. “JavaScript Variables.”The Point,Available here 2.JavaScript Data Types,w3schools.comAvailable here ...
In JavaScript, "==" and "===" are comparison operators used to compare values or variables. The main difference between them is that "==" (double equals) checks for equality of values, whereas "===" (triple equals) checks for both equality of values and types. When using "==" to ...
Function names are not required for functions stored in variables. They are constantly called (invoked) using the variable name. Example Code: var add = function(b, c) { return b + c; }; console.log(add(5, 4)); Run Code Output: 9 Function expressions load once the interpreter ...
== is the type-converting equality operator. It converts types for the check if necessary and then checks strict value equality. === is the strict equality operator. Variables are only equal if they have the same type and the same value. yes but even if the data value is the same, if...
('\nset variables'); var functionVar = 'functionVar'; let functionLet = 'functionLet'; write('\nfunctionVar: ' + functionVar); write('functionLet: ' + functionLet); } function blockScoped() { write('\n### block ###'); write('\nblockVar: ' + blockVar); //undefined, but...
On the other hand, the === operator performs a strict comparison, checking both the value and the data type of the variables. If both the value and the type match, it returns true; otherwise, it returns false. Check out my other JavaScript articles here: Difference Between let, var, ...
1. Differences between var, let and const We will see the main differences in short, and then we will explain further in the post. Variables declared byvarandconstkeywords arefunction scopedand are scoped to the immediate function body. ...
3. Differences betweenundefinedandnullKeywords 3.1. Using equality operators withnullandundefined Always remember to usestrict equality operator(===) for comparing variables withnullandundefined, when we want to clearly distinguish betweennullandundefinedvariables. ...
write('\nset variables');varfunctionVar = 'functionVar'; let functionLet= 'functionLet'; write('\nfunctionVar: ' +functionVar); write('functionLet: ' +functionLet); }functionblockScoped() { write('\n### block ###'); write('\nblockVar: ' + blockVar);//undefined, but visible...
Difference between global and local scope Local scopeGlobal scope The variables which are declared in local scope (scope of any function) are known as local variables to that function.The variables which are declared in Global scope (outside of the main) are known as Global variables to the ...