programming-for-dummies

202
Looping a Fixed Number of Times with the FOR-NEXT Loop
FOR I = 1 TO 5
PRINT “John Smith”
I = 3
NEXT I
This FOR-NEXT loop runs five times. The first time the FOR-NEXT loop runs,
the value of the I variable is set to 1. But within the FOR-NEXT loop, the
value of the I variable is then set to 3. So each time the FOR-NEXT loop runs
again, it checks to see if the I variable’s value is between 1 and 5.
Because the FOR-NEXT loop always resets the value of the I variable to 3,
the I variable never falls outside the range of 1 to 5, so this FOR-NEXT loop
runs indefinitely.
The curly bracket language family creates a FOR-NEXT loop that looks
slightly different than the way other languages do. For example, this is how
BASIC creates a FOR-NEXT loop:
FOR I = 1 TO 15
PRINT “John Smith”
NEXT I
This is the equivalent FOR-NEXT loop in C:
for (i = 1, i