AND OR Operator

Question

Simply put, is there and operator for the AND OR concept?

EX: if (a = true AND OR b = true)

If not an operator, what process could be done to do this?

Answer 1

The English concept and/or is already represented in C-based languages as ||, which is inclusive.

By that, I mean a || b is true if a is true, or b is true or both are true.

The "you are a boy or a girl" meaning of "or" (either "you are a boy" or "you are a girl", but not both) is exclusive, and is not really catered for with primitive operators.

To achieve that, you could use an expression like:

a != b

assuming they were values generated by a Boolean operation, rather than arbitrary integers (which C will also allow).

For treating arbitrary integers the same way C does, use:

!!a != !!b

The double Boolean negation will force them to be "proper" Boolean values before comparison.

---

If you want a more in-depth examination of the different bitwise operators, see this answer, or refer to the following tables, where F indicates false (or zero) and T represents true (or one):

AND | F T     OR | F T     XOR | F T    NOT | F T
----+-----    ---+----     ----+----    ----+----
 F  | F F      F | F T       F | F T        | T F
 T  | F T      T | T T       T | T F

Answer 2

In most programming languages, including C and C++, logical OR (||) takes its meaning from mathematics, and is therefore inclusive: either A or B is true, or both are true.

• true OR true = true
• true OR false = true
• false OR true = true
• false OR false = false

In English, we say “and/or” because “or” is typically exclusive, akin to logical XOR: either A or B is true, but not both.

• true XOR true = false
• true XOR false = true
• false XOR true = true
• false XOR false = false

Most languages lack a logical XOR operator, because it’s equivalent to not-equals (!=) for Booleans.

bool xor(bool a, bool b) {
  return a != b;
}

Answer 3

Did you mean XOR (Exclusive OR)?

The short answer for what the XOR operator is: ^

But from the looks of it, I think you may need a stronger foundation of how variables are compared, you may want to get familiar with this: http://www.cplusplus.com/doc/tutorial/operators/

Answer 4

Saying if A is true AND OR B is true isn't a correct programming expression nor is it a correct expression in Boolean algebra. You cant have a conjuncture and disjuncture like this in a statement. You cant represent that statement in a Venn diagram or a logic gate, and you should be able to do both with any valid Boolean expression. To see this try and write your question in a truth table.