Regex replace with number after capture group?

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I have a regex pattern like this:

([0-9]*)xyz

I wish to do substitution like this:

$10xyz

The problem is that the $1 is a capture group and the 0 is just a number I want to put into the substitution. But regex thinks I'm asking for capture group $10 instead of $1 and then a zero after it.

How do I reference a capture group and immediately follow it with a number?

asked 33 secs ago

Jakobud

16.8k

Regex replace with number after capture group?