c - Why are we having argv[2][0] -

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i came across program in c, once used argv[1] , argv[3], , once argv[2][0]. issue not i'm not able differentiate between 1-dimensional arrays , 2-dimensional arrays, issue here use of argv[2][0]. argument such dimensions? why wasn't argv[2] used instead?

thanks.

argv[2] pointer whole argument while argv[2][0] first character of argument.


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