JS Basics JS Loops/Conditionals break continue do-while loop for loop for-in loop if-else switch while loop JS String Methods JS Number Methods JS Math Functions JS Array Methods This JavaScript tutorial explains how to use the switch statement with syntax and examples. ...
Let’s make a working example of aswitchstatement following the syntax above. In this code block, we will find the current day of the week with thenew Date()method, andgetDay()to print a number corresponding to the current day.0stands for Sunday, all the way through6which stands for S...
Thedefaultkeyword specifies some code to run if there is no case match. There can only be one default keyword in a switch. Although this is optional, it is recommended that you use it, as it takes care of unexpected cases. Syntax
Syntaxswitch(expression) { case n: code block break; case n: code block break; default: default code block } This is how it works:The switch expression is evaluated once. The value of the expression is compared with the values of each case. If there is a match, the associated block ...
let str = ' Java is strongly typed language and variable must be declare first to use in program.In Java the type of a variable is checked at compile-time. JavaScript is weakly typed language and have more relaxed syntax and rules. Java is an object oriented programming language. JavaScript...
Ranges can be used because switch expressions can use any valid JavaScript expression syntax. Any expression you might use in an if statement can be used in a switch expression. JavaScript Switch vs If Statement Why would you use a switch statement instead of an if else?
Switch outperforms fancy syntax. Performance wise switch is unsurprisingly faster than the mapping version. You can do some sampling with the following snippet, just replace the version of authReducer with the mapping version after testing switch: console.time("sample");for (let i = 0; i < ...
In this tutorial you will learn about JavaScript switch case used for executing code block based on condition with syntax and code examples.
Syntax switch (expression){ case label : statements; break; case label : statements; break; ... default : statements; } Parameters expression: Value matched against the label. label: An Identifier to be matched against expression. statements: Group of statements that are executed once if the ...
In this section, we shall see one of the most common conditional statements in JavaScript and programming, in general — the if statement. The if statement executes code if a given condition is true. Here's the syntax of an if statement: if (expression) statement; We start with the if ...