Visual Basic - Logical or: or, OrElse

Logical OR works as follows: just in case it's the result false if both inputs are false, in all other cases the result is true. In next table you can find all possibilities:

a	b	x
False	False	False
False	True	True
True	False	True
True	True	True

information about the table: a, b are inputs, x is result

or

Description

par1 or par2

Used keywords: or

Input

par1 - Logical value
par2 - Logical value

Output

Result - Logical value

Both operands are evaluated independently of the value of the first operand.

Examples

Visual Basic .NET

In the source code you can find the equivalent of the above table, for easier orientation at the end of each line is a comment which shows the result.

a1 = false or false ' a1 = false
a2 = false or true  ' a2 = true
a3 = true  or false ' a3 = true
a4 = true  or true  ' a4 = true

Visual Basic .NET

Even one example in what situations we can use the operation logical or:

(b or c) or a
a or true
a>1 or a<100

Visual Basic .NET

Other pieces of example codes:

(10 >a or a<5)

a or true

j > 128 or false

OrElse

Description

par1 OrElse par2

Used keywords: orelse

Input

par1 - Logical value
par2 - Logical value

Output

Result - Logical value

If the first operand is true, then the second operand is not evaluated.

Examples

Visual Basic .NET

In the source code you can find the equivalent of the above table, for easier orientation at the end of each line is a comment which shows the result.

a1 = false OrElse false ' a1 = false
a2 = false OrElse true  ' a2 = true
a3 = true  OrElse false ' a3 = true
a4 = true  OrElse true  ' a4 = true

Visual Basic .NET

Even one example in what situations we can use the operation logical or:

(b OrElse c) OrElse a
a OrElse true
a>1 OrElse a<100

You can find it in the following collections: logical operators

Logical or in another programming language:

Differences to: