Biologie et InformatiqueAMAPmod Reference manual crochet AML functions by module
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Comparison operators
==, !=, <, <=, >, >=
Usage
x == y
x != y
x <= y
Arguments
x, y (ANY) for logical equality/difference operators == and !=. The arguments must have identical types.
x, y (INT, REAL, DATE) for order comparison operators <, <=, >, >=
Returned Object
The returned values are boolean values (type BOOL). Any of the argument may have value Undef.
Description
The logical truth value of expressions x == y and x != y is defined by the type of object that are being compared (for the precise definition associated with a particular type of object, look at the constructor functions of that object).
See Also
AML objects constructors, Not, And, Or.
Examples
AML>1 == (9 Mod 4)
<BOOL> True
AML> Not(1 == (9 Mod 4))
<BOOL> False
AML> Undef == 1
<BOOL> False
AML> Undef == Undef
<BOOL> True
AML> Date("04/01/97") < Date("05/01/97")
<BOOL> True