C - Logical Compound Operators

Question

Is the compound operator '&=' logical or bitwise AND ?

In other words, is a &= b the same as:

• a = a & b
• a = a && b

Answer 1

a &= b is using the bitwise AND operator. Think of the += operation:

a += 5;

is the same as:

a = a + 5;

It's just a combination of two operations: & and =.