How important classes are?

Answer 1

Adding..
If you mean about abstract classes..
Since you tagged abstract classes...
Please tag the language also..
https://www.sololearn.com/discuss/1558121/?ref=app
https://www.sololearn.com/discuss/2123978/?ref=app
https://www.sololearn.com/discuss/2080704/?ref=app
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https://www.sololearn.com/discuss/1921377/?ref=app
https://www.sololearn.com/discuss/2444203/?ref=app

Answer 2

no class no java... you can not create objects... then you won't be able to liverage oops