BASIC on an Apple ][+
Cause I'm old. https://t.co/i9zp1fhOT5— Dogs Don't Have Thumbs (@MorlockP) October 8, 2019
Mine was Level I Basic, a Tiny Basic derivative, on the TRS-80, approximately 1981. The first program I wrote was something like:
10 PRINT MY NAME IS MIKE
20 GOTO 10
To be fair, I was five years old.