Hp 49g Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 199)

Looping and branching

This section introduces the use of conditional branching and looping

within a program. Conditional structures evaluate 0 as false, and any other

value as true.

Comparison functions

The HP 49G provides comparison functions that you can use in

conjimction with the conditional and looping structures. You access them

from the Programming Test menu. For example, to test A in relation to B,

use the following;

A==B Returns true if A equals B.

AAB Retiuns true if A does not equal B.

A<B Returns true if A is less than B.

A>B Returns true if A is greater than B.

A<B Returns true if A is less than or equal to B.

A>B Returns true if A is greater than or equal to B.

SAME (A, B) Returns true if A is exactly the same object as B.

Conditional and looping structures

The following conditional and looping commands are available:

• IF comparison THEN code END

If comparison evaluates to true, that is a non-zero value, runs code.

• IF comparison THEN code-1 ELSE code-2 END

If comparison evaluates to true, runs code-1. If comparison evaluates

to false, code-2 is run.

• CASE expression-1 THEN code-1 END

expression-2 THEN code-2 END

expression-n THEN code-n END

END

Rims the code that corresponds to the first expression in the structure

that evaluates to true.

Introduction to programming

Page 10-13

1 2 ... 194 195 196 197 198 199 200 201 202 203 204 ... 241 242

Pas de commentaire

Hp 49g Graphing Calculator Manuel d'utilisateur Page 199