Bronze Edition Guide - True BASIC

50 BRONZE Edition Guide
! Square roots.
!
PRINT “Number”, “Square Root” ! Print labels
PRINT
! Leave blank line
FOR number = 10 to 5 step -1 ! Go from 10 down to 5
PRINT number, Sqr(number)
NEXT number
PRINT number
END
and run it again:
Number
Square Root
! Print number & square root
10 3.1622777
9 3
8 2.8284271
7 2.6457513
6 2.4494897
5 2.236068
4
As you can see, number equals 4 after the loop ends.
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x A FOR-NEXT loop always leaves the index variable with the first value
that fails the end test.
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Nested Loops
You may use any True BASIC statements inside a FOR-NEXT loop, even another loop.
Some problems are best solved by using loops inside loops, that is, nested loops.
As an illustration, open the demo program EXES:
! Print pattern of x’s.
!
FOR row = 1 to 6
FOR xcount = 1 to row
PRINT “x”;
NEXT xcount
PRINT
NEXT row
END