Can i use regex to find the index of X?

Question

I have a big string, and want to find the first occurrence of X, X is \"numberXnumber\"... 3X3, or 4X9...

How could i do this in C#?

Answer 1

this may help you

   string myText = "33x99 lorem ipsum  004x44";

    //the first matched group index
    int firstIndex =  Regex.Match(myText,"([0-9]+)(x)([0-9]+)").Index;

    //first matched "x" (group = 2) index 
    int firstXIndex =  Regex.Match(myText,"([0-9]+)(x)([0-9]+)").Groups[2].Index;