Introduction

You can put loops inside loops to do some wonderful and complicated things.

for (int i=0; i<3; i++){
	for (int j=0; j<5; j++){
		System.out.println(j);
	}
}

• Walkthrough

Check this video for a general walk through:

https://www.youtube.com/watch?v=EClSzELKdR8

The basics of loops apply to nested loops so I will not expand on it further. The main thing you have to focus on is can you walk yourself through the execution of nested loops properly.

Use cases

• Working with matrices and matrix like problems. You iterate through rows and columns to get your desired output
• If you have to repeat something for every person or stage. For example, lets say you are extracting digits, but now you have to do it for multiple users. So your loop that extracts the digits needs to be wrapped in a loop that is handling user input.