How to get the last X Characters of a Golang String?

string go character
sourcey picture sourcey · Oct 2, 2014 · Viewed 65.3k times · Source

If I have the string "12121211122" and I want to get the last 3 characters (e.g. "122"), is that possible in Go? I've looked in the string package and didn't see anything like getLastXcharacters.

Answer

OneOfOne picture OneOfOne · Oct 2, 2014

You can use a slice expression on a string to get the last three bytes.

s      := "12121211122"
first3 := s[0:3]
last3  := s[len(s)-3:]

Or if you're using unicode you can do something like:

s      := []rune("世界世界世界")
first3 := string(s[0:3])
last3  := string(s[len(s)-3:])

Check Strings, bytes, runes and characters in Go and Slice Tricks.

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