BootSelf
Check my readiness
kotlin

Ranges

1 role need it, 1 as coreUsually level 3: WorkingLesson available

Where it sits

Learn first

Characters. Char type

This skill

Ranges

Leads to

Retrieve single elementFor loop and rangesRetrieve collection parts

Jobs that need it

What level 3 (Working) means

Uses it independently on the job. Level 4 (Strong): handles hard cases, reviews others.

Start learning

Ranges

Data types

about 8 min11 parts

Open the lesson

Find out where you stand

A free check, then a route that starts at your level.

Check my readiness

Learned alongside it

Abstract classesAdditional librariesAggregate operations on collectionsAggregate operations on collections: part 2AndroidAndroid CoreAndroid JetpackAndroid studio basics

Ranges: common questions

What is Ranges?

Ranges is a skill in kotlin, needed by 1 role on BootSelf.

Which jobs need Ranges?

Android Developer. Most ask for level 3 (Working): uses it independently on the job.

What should I learn before Ranges?

Characters. Char type.

How long does it take to learn Ranges?

The starting lesson, Ranges, takes about 8 minutes. Reaching the level a job asks for takes practice on top: BootSelf measures where you are and plans the rest.

How do I practise Ranges?

Check your readiness for free, then BootSelf builds a route and short daily learning loops: a little theory, checks on what you get wrong, then a small program.