noun
boy
A1
Junge means 'boy' or young male. It is a masculine noun (der Junge) and a weak noun that adds -n in declined forms: nominative singular der Junge, accusative den Jungen, genitive des Jungen, dative dem Jungen, plural die Jungen. Plural form is Jungen.
Examples
Der Junge spielt im Garten.
The boy is playing in the garden.
Der Lehrer lobte den Jungen, weil dieser die schwierige Aufgabe schnell löste.
The teacher praised the boy because he solved the difficult task quickly.
Der Junge spielt mit seinem Ball im Park.
The boy is playing with his ball in the park.
Details
Mnemonics
imagine a little boy with a label 'der Junge' to anchor masculine gender
think English 'young' -> 'Junge' (boy) to remember the concept of youth
Notes
Weak noun (takes -n in many cases in singular and plural).