10 FOR I = 1 TO 20
20 PRINT “hello, cruel world!”
30 NEXT I
RUN
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
hello, cruel world!
Good explanation.