Evaluating Expressions

math.evaluate(expression: txt) -> dec

Evaluates a numeric expression (no free variables). Returns a dec value. Supports all built-in constants and functions.

result = math.evaluate("pi * 3^2")
print(result)   # 28.274333882308138

Examples

Using constants

main() {
    print(math.evaluate("pi * 5^2"))    # 78.53981633974483
    print(math.evaluate("2 * pi"))      # 6.283185307179586
    print(math.evaluate("e"))           # 2.718281828459045
}

Using functions

main() {
    print(math.evaluate("sqrt(16)"))    # 4.0
    print(math.evaluate("sqrt(16) + 2"))# 6.0
    print(math.evaluate("abs(-7)"))     # 7.0
}

Arithmetic

main() {
    print(math.evaluate("2 + 3 * 4"))   # 14
    print(math.evaluate("(2 + 3) * 4")) # 20
}

WARNING

Expressions with free variables (e.g. "x + 1") return an error. Use math.solve() or math.simplify() for symbolic work.