why are we subtracting 0 in stringtoint function
i.e. in line
ans+= ((str[i]-‘0’)*p);
Stringtoint function
Hello @aviralpandey003,
String is a collection of characters like: “abc”, “123” and “a_9h+”
And each character is identified by ASCII numbers.
You may refer to the following chart:
In this question we are talking specifically about the string of digits.
The ASCII number for ‘0’ (a character not integer) is 48
Suppose str[i] contains ‘0’
So, atr[i]-‘0’ = ‘0’-‘0’ = 48-48 =0(this is an integer)
Similarly for other character digits.
Hope, this would help.
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