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Why + prefixes with variables in println

Please explain the reason for each + prefixes and suffix against the variables in println.

7th Jul 2020, 5:50 PM
Prakash
2 Réponses
+ 2
In which language? Can you show a example what about you are asking...?
7th Jul 2020, 5:57 PM
Jayakrishna 🇮🇳
+ 2
String concatenation?
7th Jul 2020, 7:03 PM
♡Addy♡
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