HP 12c financial calculator 사용자 설명서
103
File name: hp 12c_user's guide_English_HDPMBF12E44
Page: 103 of 209
Printered Date: 2005/7/29
Dimension: 14.8 cm x 21 cm
Section 9
Branching and Looping
Although the instructions in a program normally are executed in order of their
program line numbers, in some situations it is desirable to have program execution
transfer or “branch” to a program line that is not the next line in program memory.
Branching also makes it possible to automatically execute portions of a program
more than once — a process called “looping.”
program line numbers, in some situations it is desirable to have program execution
transfer or “branch” to a program line that is not the next line in program memory.
Branching also makes it possible to automatically execute portions of a program
more than once — a process called “looping.”
Simple Branching
The i (go to) instruction is used in a program to transfer execution to any
program line. The program line desired is specified by keying its two-digit line
number into the program line containing the i instruction. When the i
instruction is executed, program execution branches or “goes to” the program line
specified and then continues sequentially as usual.
program line. The program line desired is specified by keying its two-digit line
number into the program line containing the i instruction. When the i
instruction is executed, program execution branches or “goes to” the program line
specified and then continues sequentially as usual.
You have already seen a common use of branching: the i00 instruction (that is
stored in program memory after the program you key in) transfers execution to
program line 00. A i instruction can be used to branch not only backward in
program memory — as in the case of i00 and as illustrated above — but also
forward in program memory. Backward branching is typically done to create
loops (as described next); forward branching is typically done in conjunction with
an o or m instruction for conditional branching (as described afterward).
stored in program memory after the program you key in) transfers execution to
program line 00. A i instruction can be used to branch not only backward in
program memory — as in the case of i00 and as illustrated above — but also
forward in program memory. Backward branching is typically done to create
loops (as described next); forward branching is typically done in conjunction with
an o or m instruction for conditional branching (as described afterward).