Resolved: actually i did not get the usage of ? symbol in word sarah

In regular expressions (regex), the '?' symbol means that the character(or charecters) right before it is optional. This means that the regex will match the pattern whether that character is there or not.

For example:

pattern_to_find = r"sarah?"

The '?' after the "h" tells the regex to look for "sara" and also "sarah." The 'r' before the pattern means we're using a raw string in Python, so special characters are treated exactly as they are written.

So, sarah? will match:
- "sara" (because the "h" is optional)
- "sarah" (because the "h" can be there)

It won’t match anything with extra characters like "saraha" or "sarahh."

 

The '?' is not like '_' in MySQL, which represents any single character. Instead, it just makes the "h" optional, allowing for both "sara" and "sarah" to match.

Happy learning!