Question

purpose of shortcut key ctrl+ a​

Answer 1

Heyamate!!

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$\mathfrak{\green{\huge{Answer}}}$

The purpose of it is to select the all text of the open content.

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$\mathcal{\red{\huge {Hope\:it\:helps}}}$

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$\mathbb{\huge{\blue{R-K}}}$

Answer 2

Hey mate this is your answer:

purpose of shortcut key ctrl+a is to select all

I hope it helps you