104 Section 9: Branching and Looping
Conditional Branching
Often there are situations when it is desirable for a program to be able to branch
to different lines in program memory, depending on certain conditions. For
example, a program used by an accountant to calculate taxes might need to
branch to different program lines depending on the tax rate for the particular
income level.
Ê
002, 45 0
Line 002: :0. Program
execution has branched to the
beginning of the loop for the
second pass through it.
1.00
Ê
003, 42 11
Line 003: f!.
–531.12
Portion of second month’s
payment applied to interest.
Ê
004, 43 31
Line 004: gu.
–531.12
Ê
005, 34
Line 005: ~.
–12.23
Portion of second month’s
payment applied to principal.
Ê
006, 43 31
Line 006: gu.
–12.23
Ê
007,43,33,002
Line 007: gi002.
This is the end of the second pass
through the loop.
–12.23
t
–530.99
Portion of third month’s payment
applied to interest.
–12.36
Portion of third month’s payment
applied to principal.
t(or any key)
–12.36
Halts program execution.
a More precisely, the number in the X-register.
Keystrokes Display
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