or -- disjunction

Usage:

t or u
Inputs:
- t, a Boolean value or a function,
- u, a Boolean value or a function,
Outputs:
- a Boolean value or a function,

Description

If t or u are booleans, then t or u returns true if either is true.

i1 : even 7 or isPrime 7

o1 = true

If t is true, then the code in u is not evaluated.

i2 : even 6 or 1/0

o2 = true

If they are both functions that return booleans, then the return value is also a function.

i3 : isEvenOrPrime = even or isPrime

o3 = isEvenOrPrime

o3 : FunctionClosure

i4 : isEvenOrPrime 7

o4 = true

i5 : isEvenOrPrime 9

o5 = false

Ways to use symbol or:

Boolean or Boolean
Function or Function

For the programmer

The object or is a keyword.

This operator may be used as a binary operator in an expression like x or y. The user may install binary methods for handling such expressions with code such as

         X  or  Y := (x,y) -> ...

where X is the class of x and Y is the class of y.

The source of this document is in Macaulay2Doc/operators.m2:254:0.

or -- disjunction

Description

See also

Ways to use symbol or:

For the programmer