Maintenance script: Initial automated import

2016-02-24T18:14:17Z

Initial automated import

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

The = (equal) operator takes two numbers, variables, or expressions, and tests to see if they are equal to each other. It will return 1 if they are, and 0 if they are 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
0

= 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}

Besides real numbers and lists, = also allows you compare strings, matrices, and complex numbers. However, the variables must be of the same type, otherwise the calculator will throw a [[TI-BASIC:Errors#datatype|ERR:DATA TYPE]] error; and just like with lists, both matrices must have the same dimensions, otherwise you will get a [[TI-BASIC:Errors#dimmismatch|ERR:DIM MISMATCH]] error.

:[[TI-BASIC:1,2,3|1,2,3]]=[[1,2,3
1
:"HELLO"="WORLD
0
:(3+4i)=(5-2i) (the parentheses are added for clarity)
0

= Optimization =

When the only values that are possible for a variable are 1 and 0, you can get rid of the = sign and simply use the variable by itself.

:If X=1
can be
:If X

= Error Conditions =

* '''[[TI-BASIC:Errors#datatype|ERR:DATA TYPE]]''' is thrown if you try to compare two different kinds of variables, such as a string and number or a list and matrix.
* '''[[TI-BASIC:Errors#dimmismatch|ERR:DIM MISMATCH]]''' is thrown if you try to compare two lists or matrices that have different dimensions.

= Related Commands =

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

TI-BASIC:Equal - Revision history

Maintenance script: Initial automated import