What are the differences between various assignment operators in programming languages?

In C and C++, there are several assignment operators that differ in functionality:

• = — simple assignment operator, assigns the value on the right to the variable on the left.
• +=, -=, *=, /=, %= and others — compound assignment operators that perform an operation with the current value of the variable and assign the result back. For example, a += 5 is equivalent to a = a + 5.

Assignment operators can work with different data types, but it is important to consider types and possible conversions.

Example:

int a = 10;
a += 5;  // now a equals 15

float b = 3.5;
b *= 2;   // now b equals 7.0

The difference is that compound operators allow writing more compact code and can sometimes be optimized by the compiler more efficiently than separate assignment with an operation.