Evaluate math expressions

Evaluate a restricted arithmetic expression with parentheses and normal operator precedence.

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ToolExpression Evaluator
Input
Output
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Preview

How it works

A recursive-descent parser handles parentheses, addition, subtraction, multiplication, division, and right-associative exponentiation. It consumes the complete string and rejects leftover characters or malformed operators.

  • Implicit multiplication and variables are not included.
  • Division by zero and missing parentheses are errors.

Worked example

Arithmetic Expression
Evaluate a compound arithmetic expression
Input
											(2 + 3) * 4 - 6 / 2
Output
												17

When to use this

Arithmetic checks evaluate formulas, teaching examples demonstrate precedence, and local previews compute restricted numeric expressions.

Edge cases

  • 2^3^2 groups as 2^(3^2).
  • 2(3) is rejected because implicit multiplication is unsupported.
  • A missing closing parenthesis stops evaluation.