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Bit Setting in C.md

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+
+#### Setting a bit
+Use the bitwise OR operator ( | ) to set a bit.
+```c
+number |= 1 << x;
+```
+That will set bit x.
+
+#### Clearing a bit
+Use the bitwise AND operator (&) to clear a bit.
+```c
+number &= ~(1 << x);
+```
+That will clear bit x. You must invert the bit string with the bitwise NOT operator (~), then AND it.
+
+#### Toggling a bit
+The XOR operator (^) can be used to toggle a bit.  
+```c
+number ^= 1 << x;
+```
+That will toggle bit x.
+
+### Checking a bit
+To check a bit, shift the number x to the right, then bitwise AND it:
+```c
+bit = (number >> x) & 1;
+```
+That will put the value of bit x into the variable bit.
+
+#### Changing the nth bit to x
+Setting the nth bit to either 1 or 0 can be achieved with the following:
+```c
+number ^= (-x ^ number) & (1 << n);
+```
+Bit n will be set if x is 1, and cleared if x is 0.