How JavaScript uses the switch statement to select the block of code to be executed

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JavaScript Switch statement

Switch statements are used to perform different actions based on different conditions.

Use the switch statement to select one of several blocks of code to execute. The syntax is as follows:

Switch (n) {case 1: / execute code block 1 break; case 2: / execute code block 2 break; default: / / n code that is not executed at the same time as case 1 and case 2}

working principle

First set the expression n (usually a variable). The value of the expression is then compared to the value of each case in the structure. If there is a match, the block of code associated with the case is executed. Use break to prevent the code from automatically running to the next case.

Example

Click the button below to show what day it is today: