Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28
Credits:
Special thanks to @ts for adding this problem and creating all test cases.
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public class demo1 {
public int titleToNumber(String s) {
int result=0;
for(int i=s.length()-1;i>=0;i--){
result=(int) (result+(s.charAt(i)-64)*(Math.pow(26, s.length()-i-1)));
}
return result;
}
public static void main(String[] args){
String s="AA";
demo1 r = new demo1();
System.out.println(r.titleToNumber(s));
}
}