parse

parse(expr)

parse(expr, options)

parse([expr1, expr2, expr3, ...])

parse([expr1, expr2, expr3, ...], options)

Try it yourself:

@1	node1 = parse("sqrt(3^2 + 4^2)")
@2	node1.evaluate()
@3	code1 = node1.compile()
@4	code1.evaluate()
@5	scope = {a: 3, b: 4}
@6	node2 = parse("a * b")
@7	node2.evaluate(scope)
@8	code2 = node2.compile()
@9	code2.evaluate(scope)

parse(): turn expression text into a calculation

parse(text) reads mathematical text and produces an expression that can be evaluated or transformed. It is the bridge between calculator input and structured mathematics.

Example

Parsing 2 * (x + 1) preserves its operators and grouping. It is safer than trying to manipulate a formula with ordinary text replacement.

Workflow

Use evaluate() to calculate a parsed expression, simplify() to transform it, and numeric() for an approximation. parser() supports a reusable evaluation context.

Caveat

Treat untrusted expression text carefully. Validate expected variables and syntax before evaluating it in a wider application.

All functions

calcul.io

math playground