How do I get only certain portion of my string?

Hi all...

I have a string that consists of several parts that are delimited with unreserved symbol.

eg. hyphen, underscore or tilde.

Like this: xxxxxxx_yyyyyyyy_zzzzzzzzz_wwwwww_qqqqqq

I want to get part between first and second underscore, then part between third and fourth underscore and so on...

How can i get only certain portion at the time of this string?

Thanx

from the manual https://www.scirra.com/manual/126/system-expressions

tokenat(src, index, separator)
Return the Nth token from src, splitting the string by separator. For example, tokenat("apples|oranges|bananas", 1, "|") returns oranges.
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Walessio

Thanks... shame on me for not seeing that!