==

Member Of Menu: 
Test
Argument Types: 
Real
Complex
Integer
List
String
Symbol
Expression
Program
Array
Result Type(s): 
Real
Expression
Invertible: 
No
Valid In Expression: 
Yes
Stack Diagram: 
Real1 Real2 → Real3
Real1 Complex2 → Real3
Complex1 Real2 → Real3
Complex1 Complex2 → Real3
Integer1 Integer2 → Real3
Real1 Integer2 → Real3
Integer1 Real2 → Real3
List1 List2 → Real3
String1 String2 → Real3
Array1 Array2 → Real3
Symbol1 Symbol2 → Expression3
Expression1 Expression2 → Expression3
Program1 Program2 → Real3

This operation produces a 1 if the two arguments are equal, a 0 otherwise. It can operate on real, complex, integer, list or string values. It also can compare real and complex numbers and real and integer numbers. Note that a vector is equal if it has the same number of values and those values are the same. Similarly, a matrix is equal if it has the same number of rows and columns and each value is the same.

Note that this operation does not appear on a calculator key directly but it can be used by pressing the "=" key twice.