Radio Shack TRS-80 PC-3 Owner's Manual page 137

Examples
10 INPUT A$ This program prints 'YES' if a 'Y' is entered and prints 'NO' if anything else is entered.
20 IF A$
=
"Y" THEN GOTO 50
30
PRINT "NO"
40 GOTO 60
50 PRINT "YES"
60 END
137