Texas Instruments TI-89 사용자 설명서

Programming

 603

Conditional Tests

Conditional Tests

Conditional Tests

Conditional Tests

Conditional tests let programs make decisions. For example, depending on whether a 
test is true or false, a program can decide which of two actions to perform. Conditional 
tests are used with control structures such as 

 and loops such as 

 (described later in this module).

Returns a specified number of characters from the right side 
(end) of a string.

Rotates the characters in a string. The default is L1 (rotate 
right one character).

Shifts the characters in a string and replaces them with 
spaces. The default is 

L

1 (shift right one character and 

replace with one space). Examples: shift("abcde",2)

⇒

"cde " 

and shift("abcde")

⇒

" abcd"

Converts a numeric expression into a string. This is the 
opposite of the expr command.