The tilde operator in C

The ~ operator is bitwise NOT, it inverts the bits in a binary number:

NOT 011100  = 100011

c++ c operators

~ is the bitwise NOT operator. It inverts the bits of the operand.

For example, if you have:

char b = 0xF0;  /* Bits are 11110000 */char c = ~b;    /* Bits are 00001111 */

c++ c operators

This is the bitwise NOT operator.It flips all the bits in a number: 100110 -> 011001

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