Table true/false for C Language

I have heard of a table true false for C Language for and && or || is kind of the mathematics one for which they say if true+true=true and false+true=false

I'm just kind of confuse on this and I tried to do the research but couldn't find any of the table

I just wish to have this table for my notes since I will do more in C language

if someone could bring me to the site or resources where they explain about this more

I've edited my original question to make it a note for my own study. Thanks @thiton for the great references and the rest for an awesome answer/resources.

Logical AND (&&)

false && false: false

false && true: false

true && false: false

true && true: true

Logical OR (||)

false || false: false

false || true: true

true || false: true

true || true: true

Logical NOT (!)

!false: true

!true: false

5 Answers

You probably mean a truth table for the boolean operators, which displays the result of the usual boolean operations (&&, ||). This table is not language-specific, but can be found e.g. here.

You're thinking of Boolean algebra.

Truth values can be described using a Boolean algebra. The article also contains tables for and and or. This should help you to get started or to get even more confused.

I think You ask for Boolean algebra which describes the output of various operations performed on boolean variables. Just look at the article on Wikipedia.

I`d like to add to the already good answers:

The symbols '+', '*' and '-' are sometimes used as shorthand in some older textbooks for OR,∨ and AND,∧ and NOT,¬ logical operators in Bool`s algebra. In C/C++ of course we use "and","&&" and "or","||" and "not","!".

Watch out: "true + true" evaluates to 2 in C/C++ via internal representation of true and false as 1 and 0, and the implicit cast to int!

int main ()
{ std::cout << "true - true = " << true - true << std::endl;
// This can be used as signum function:
// "(x > 0) - (x < 0)" evaluates to +1 or -1 for numbers. std::cout << "true - false = " << true - false << std::endl; std::cout << "false - true = " << false - true << std::endl; std::cout << "false - false = " << false - false << std::endl << std::endl; std::cout << "true + true = " << true + true << std::endl; std::cout << "true + false = " << true + false << std::endl; std::cout << "false + true = " << false + true << std::endl; std::cout << "false + false = " << false + false << std::endl << std::endl; std::cout << "true * true = " << true * true << std::endl; std::cout << "true * false = " << true * false << std::endl; std::cout << "false * true = " << false * true << std::endl; std::cout << "false * false = " << false * false << std::endl << std::endl; std::cout << "true / true = " << true / true << std::endl; // std::cout << true / false << std::endl; ///-Wdiv-by-zero std::cout << "false / true = " << false / true << std::endl << std::endl; // std::cout << false / false << std::endl << std::endl; ///-Wdiv-by-zero std::cout << "(true || true) = " << (true || true) << std::endl; std::cout << "(true || false) = " << (true || false) << std::endl; std::cout << "(false || true) = " << (false || true) << std::endl; std::cout << "(false || false) = " << (false || false) << std::endl << std::endl; std::cout << "(true && true) = " << (true && true) << std::endl; std::cout << "(true && false) = " << (true && false) << std::endl; std::cout << "(false && true) = " << (false && true) << std::endl; std::cout << "(false && false) = " << (false && false) << std::endl << std::endl;
}

yields :

true - true = 0
true - false = 1
false - true = -1
false - false = 0
true + true = 2
true + false = 1
false + true = 1
false + false = 0
true * true = 1
true * false = 0
false * true = 0
false * false = 0
true / true = 1
false / true = 0
(true || true) = 1
(true || false) = 1
(false || true) = 1
(false || false) = 0
(true && true) = 1
(true && false) = 0
(false && true) = 0
(false && false) = 0