How to stop looping .wav file

This is probably a daft question, but I know nothing about sound files.

I have a .wav file which I wanted to modify, which was no problem. But the original came as an ever-repeating loop, and I just want it to play once.

Can somebody please tell me in words somebody totally ignorant about this would understand, how to stop it looping?

Many thanks!

That is most likely a feature of your audio player rather than anything to do with the WAV file.