Explain what is meant by the operation of increasing a variable's value by one.

The operation of increasing a variable's value by one in Java is usually called increment. It is performed using the ++ operator.

There are two usage options:

• Prefix increment (++var) — first increases the variable's value, then returns the new value.
• Postfix increment (var++) — first returns the current value of the variable, then increases it.

Example:

int a = 5;
int b = ++a; // a becomes 6, b also 6

int c = 5;
int d = c++; // d will be 5, and c will become 6 after the operation

Increment is often used in loops and counters for convenient incrementing of the value by 1.