Maintenance script: Initial automated import

2016-02-24T18:08:33Z

Initial automated import

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{{Template:TI-BASIC:Command
|picture=LESSTHANEQUAL.PNG
|summary=Returns true if value1 is less than or equal to value2.
|syntax=''value1''≤''value2''
|location=Press:
# 2nd TEST to access the test menu.
# 6 to select ≤, or use arrows.
|compatibility=TI-83/84/+/SE
|size=1 byte
}}

The ≤ (less than equal) operator takes two numbers, variables, or expressions, and tests to see if the first one has a value less than or equal to the second one. It will return 1 if it is less than or equal to, and 0 if it is not. When determining the order of operations, ≤ will be executed after the [[TI-BASIC:Operators#math|math]] operators, but it will be executed before the [[TI-BASIC:Operators#logical|logical]] operators and in the order that it appears from left to right with the other [[TI-BASIC:Operators#relational|relational]] operators.

:1≤0
0

:DelVar X3→Y
:X≤Y
1

= Advanced Uses =

Just like the other relational operators, ≤ can take real numbers and lists for variables. In order to compare the lists, however, both must have the same dimensions; if they don't, the calculator will throw a [[TI-BASIC:Errors#dimmismatch|ERR:DIM MISMATCH]] error. When comparing a real number to a list, the calculator will actually compare the number against each element in the list and return a list of 1s and 0s accordingly.

:{2,4,6,8}≤{1,3,5,7
{0 0 0 0}
:5≤{1,2,3,4,5
{0 0 0 0 1}

Unfortunately, ≤ does not work with strings, matrices, or complex numbers (only [[TI-BASIC:Equal|=]] and [[TI-BASIC:Notequal|≠]] do), and the calculator will actually throw a [[TI-BASIC:Errors#datatype|ERR:DATA TYPE]] error if you try to compare them. In the case of strings, however, it should be pretty obvious why: a string represents a sequence of characters, and does not associate a value to any character, so there is nothing to compare.

= Error Conditions =

* '''[[TI-BASIC:Errors#datatype|ERR:DATA TYPE]]''' is thrown if you try to compare strings, matrices, or complex numbers.
* '''[[TI-BASIC:Errors#dimmismatch|ERR:DIM MISMATCH]]''' is thrown if you try to compare two lists that have different dimensions.

= Related Commands =

* [[TI-BASIC:Equal|=]] (equal)
* [[TI-BASIC:Notequal|≠]] (not equal)
* [[TI-BASIC:Greaterthan|>]] (greater than)
* [[TI-BASIC:Greaterthanequal|≥]] (greater than equal)
* [[TI-BASIC:Lessthan|<]] (less than)[[Category:TI-BASIC]]
[[Category:TIBD]]

TI-BASIC:Lessthanequal - Revision history

Maintenance script: Initial automated import