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What is the meaning of <<= and |= in C?
I recognise << is bitshift etc. but I don't know what these are in combination.
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The bitwise OR assignment operator ( |= ) uses the binary representation of both operands, does a bitwise OR operation on them and assigns the result to the variable.
operator. ~ is bitwise complement bits, 0 to 1 and 1 to 0 (Unary operator) but ~= not an operator. Additionally, ! Called Logical NOT Operator, but != Checks if the value of two operands are equal or not, if values are not equal then condition becomes true.
|= is analogous to operators like += and -= in that it will perform a bitwise OR on the two operands then store the result in the left operator.
Since >> is the binary right-shift operator, it means to shift the value in set right by 1 bit.
Just as x += 5 means x = x + 5, so does x <<= 5 mean x = x << 5.
Same goes for |. This is a bitwise or, so x |= 8 would mean x = x | 8.
Here is an example to clarify:
int x = 1; x <<= 2; // x = x << 2; printf("%d", x); // prints 4 (0b001 becomes 0b100) int y = 15; y |= 8; // y = y | 8; printf("%d", y); // prints 15, since (0b1111 | 0b1000 is 0b1111) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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