Regex for rise/rising

Question

text = rise rising risi
pattern to match only rise and rising. Must not match risi.
I try pattern ris[e(ing)] and match rise and risi
What is wrong there?

Answer 1

The pattern you wrote will match rise, risi, risn, risg. When you use square brackets it's like saying "match ANY of the characters inside the sqare brackets.
What you need is: |
Regex you need is: ris(e|ing).
What is in paslranthesis means match: e OR ing
Read more about regex: https://stackoverflow.com/questions/4736/learning-regular-expressions

Answer 2

ris(e|ing)