Bitwise Operations and Masking

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Bitwise Operations and Masking in C Programming

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1. Mask means to block.
2. Masking is the process by which , only required data is retained and the rest is masked (blocked)
3. Masking can be done using Bitwise Operators
4. Most Commonly Used Bitwise Operator is AND(&)

Process of Masking :We want Last 4 LSB Bits , So Mask it with (0000 0000 0000 1111)

Num 1 : 1000 0001 1110 1011
& : 0000 0000 0000 1111

We get Result as :-

Num 1 : 0000 0000 0000 1011  // First 12 bits are Masked

Thus ....

1. Portion to be retained is ANDed with 1 
2. Portion to be Masked is ANDed with 0

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Tags / Keywords : | Bit manipulation, bitwise operators, Masking

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