Expression

A C++ expression is any valid combination of operands and operators that produces a value.

Key points:

1. An expression is not required to have an operator.
2. Even a single operand is an expression, because it yields a value.

Examples:

• Single operand:

  • 5 (constant)
  • x (variable)
  • func() (function call)

• Operand + operator:

  • a + b
  • x * 10
  • i++

• More complex:

  • x = y + 3
  • (a && b) || c

Rule of thumb:

If it produces a value, it is an expression.

Related:

• Statement
• Operator
• Operand