In the old days you saved up an extraordinary amount of money, bought a Commodore 64, plugged it in, and then had absolutely no idea what to do unless you had books. So you went and got books or magazines, some maybe from the library, some from bookstores, and many of them might be for systems other than the C64. It wasn't uncommon for a magazine to have to cater to a dozen slightly different versions of BASIC: Apple…
Meanwhile, any 10-yr old can understand this code:
10 PRINT "Hey there Joe"
20 GOTO 10
Boom. Functional program. Instant gratification. That will be the last program this person ever writes that provides such instant reward, but nevermind, that foundational idea that the computer can bend to your will is planted.