The switch case is an alternative of if…else statement which does almost the same thing. The switch case statement tests a variable against a series of values until it finds its match.
When you write a code for developing your web page, you may have the situations where you want to handle some statements of your code with some conditions.
The CSS z-index property specifies the layering or stacking of positioned elements. In other words, z-index value decides which layer has to be shown in front and in back. The element having higher z-index value will be shown in front as compared to elements having lower z-index values.