An expression is a combination of symbols that, when evaluated, produces a value. Expressions are typically composed of a mix of operators, operands, and subexpressions.
- An expression can also consist of a single literal or variable.Thus, 4, 3, and k are each expression. This expression has two subexpressions, 4 and (3 * k). Subexpression (3 * k) itself has two subexpressions, 3 and k. Any expression that is part of a larger expression is called a subexpression.
- Subexpressions can be denoted by the use of parentheses. Since a subexpression is an expression, any subexpression may contain subexpressions of its own
Arithmetic Expressions:
- Expressions that evaluate to a numeric type are called arithmetic expressions.
- If no parentheses are used, expressions are evaluated based on the rules of operator precedence.
output is 20