Quick Reference Guide
122 TI-Nspire™ Reference Guide
{
 (less or equal)
/= keys
Expr1
 { Expr2 ⇒  Boolean expression
List1
 { List2 ⇒  Boolean list
Matrix1 { Matrix2 ⇒  Boolean matrix
Returns true if Expr1 is determined to be less than or equal to Expr2.
Returns false if Expr1 is determined to be greater than Expr2.
Anything else returns a simplified form of the equation.
For lists and matrices, returns comparisons element by element.
Note: You can insert this operator from the keyboard by typing <=
See “=” (equal) example.
> 
(greater than)
/= keys
Expr1 > Expr2 ⇒  Boolean expression
List1 > List2 ⇒  Boolean list
Matrix1 > Matrix2 ⇒  Boolean matrix
Returns true if Expr1 is determined to be greater than Expr2.
Returns false if Expr1 is determined to be less than or equal to 
Expr2.
Anything else returns a simplified form of the equation.
For lists and matrices, returns comparisons element by element.
See “=” (equal) example.
|
 (greater or equal)
/= keys
Expr1 | Expr2 ⇒  Boolean expression
List1 | List2 ⇒  Boolean list
Matrix1 | Matrix2 ⇒  Boolean matrix
Returns true if Expr1 is determined to be greater than or equal to 
Expr2.
Returns false if Expr1 is determined to be less than Expr2.
Anything else returns a simplified form of the equation.
For lists and matrices, returns comparisons element by element.
Note: You can insert this operator from the keyboard by typing >=
See “=” (equal) example.
! (factorial)
º key
Va lu e1 ! ⇒ value
List1! ⇒ list
Matrix1! ⇒ matrix
Returns the factorial of the argument.
For a list or matrix, returns a list or matrix of factorials of the 
elements.
& 
(append)
/k keys
String1 & String2 ⇒ string
Returns a text string that is String2 appended to String1.










