convertToInt() function

#1

int convertToInt(string s)
{
int ans=0;
int p=1;
for(int i=s.length()-1;i>=0;i–)
{
ans+=(s[i]-‘0’) * p;
p *= 10;
}
return ans;
}

in the for loop why did we subtract ‘0’ from s[i]

1 Like
#2

Hey @anasmir24
if s[i] is ‘6’ it is present in character form in the string, so you need to convert it into int for adding it to the ans variable, and to convert the character to integer, you need to subtract the ASCII value of ‘0’ from it.

1 Like
#3

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