Here is an example of an If-else condition:
The tempature is 80
It's hot today, stay cool!

Here is an example of an If-else-if-else condition:
The score of your test is an 85
Your grade is a B.

Here is an example of a switch/case condition:
It's Wednesday
It's a normal school day!

An if-else condition checks and condition and executes a block of code if true, if not it executes a different block. An if-else-if-else condition checks multiple conditions in order till it finds the right one to execute. A switch/case condition compares the given value against the other values you give it.