String to integer recusrion video

#1

sir, please tell me how digit=a[n-1]-‘0’; gives the last digit ?

#2

hi @Abhishmu5 suppose the string is “1234”
s[n-1] gives '4' which is a character with ascii value 52. '0' is a character with ascii value 48.
So '4' - '0' will give us the difference between their ascii values, ie 52 - 48 = 4. Hence we will get the last digit.

#3

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