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YG's putting his money where his mouth is -- he wants young girls of diverse backgrounds to have opportunities in the tech world, and he's writing a $150k check to make it happen.

The Compton rapper delivered the check to Girl Code LA on Wednesday ... a move inspired by his little girl. Girl Code is an L.A.-based organization -- founded by Dez White -- pushing to develop and expose young women to computer science, business and software engineering.

YG tells TMZ, "With my donation, I hope they'll be able to expand their reach of future female coders and programmers. I want to make sure I'm doing my part. I got a daughter and I respect the G Code."

He also made sure the current slate of young and bright G girls walked away with more than just a smile -- he gifted all the young coders with new "Beats by Dre" headphones. Come up!!

He also chatted with them about the importance of exploring nontraditional career paths.