MHB Learn the Basics of Bitwise Arithmetic: A&B = 12 (Integer Variables A=60, B=13)

[tmt1]

"Assume integer variable A holds 60 and variable B holds 13 then:A&B will give 12"

Why is this?

 

[evinda]

"Assume integer variable A holds 60 and variable B holds 13 then:A&B will give 12"

Why is this?

Write the binary represetation of $A$ and $B$ and then add them.
For example, the binary representation of $A$ is $0011 1100$.

 

[tmt1]

Write the binary represetation of $A$ and $B$ and then add them.
For example, the binary representation of $A$ is $0011 1100$.

I get 01001001 how is this 12?

 

[evinda]

I get 01001001 how is this 12?

You have to use this truth table for &:

$$\begin{bmatrix}
p & q & p \& q \\
0 & 0 & 0\\
0 & 1 & 0 \\
1 & 1 & 1\\
1 & 0 &0
\end{bmatrix}$$

Then, the result will be $0000 1100$. (Nerd)

 

[johng1]

In C, Java and other languages, & is the bitwise and of the integer operands. So for example, 6 & 4 is 110 & 100 = 100 = 4. Similarly | is the bitwise or operator. So 6 | 4 = 110 | 100 = 110 = 6. Similarly ^ is the bitwise exclusive or operator. So 6 ^ 4 = 010 = 2.