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256 Programming

When assigning a value to a cell in a list, vector, or

matrix, use the  command rather than :=. For example,

the command 73

 L1(5) will put the number 73 into the

5th position of list L1. If you are entering a program using

a calculator emulator running on a computer, then => can

be used as a synonym for

.

Branch

Commands

IF…THEN…END Syntax: IF test THEN command(s) END;

Evaluate test. If test is true (non 0), execute command(s).

Otherwise, nothing happens.

Example:

IF…THEN…ELSE…END Syntax: IF test THEN command(s)1 ELSE command(s)2

END;

Evaluate test. If test is true (non 0), execute command(s)1,

otherwise, execute command(s)2

IFTE Syntax: IFTE(test,true_xpr,false_xpr)

Evaluates test. If test is true (non 0), return true_xpr,

otherwise return false_xpr

IFERR…THEN…END IFERR commands1 THEN commands2 [ELSE

commands3] END;

Executes sequence of commands1. If an error occurs

during execution of commands1, execute sequence of

commands2. Otherwise, execute sequence of

commands3.

CASE…END Syntax:

CASE

IF test1 THEN commands1 END

IF test2 THEN commands2 END

…

[DEFAULT commands]

END;

Evaluates test1. If true, execute commands1 and end the

CASE. Otherwise, evaluate test2

. If true, execute

HP 39gII User Manual

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