Can't we use typecasting instead

#1

can’t we use typecasting instead of writing :
int digit = in[i]-‘0’;
in video cpp-recursion-phone Keypad

#2

Hi
In this context, No, because ASCII value of 5 is 53, if you typecast to int it will give you 53. here we want 5 only. So that is why we subtract ‘0’ which has ASCII code 48
53-48=5

#3

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