Evaluate numerical expressions
npm install eval-num-expr``
npm install --save eval-num-expr
`js
import evalExpr from "eval-num-expr";
const value = evalExpr("100 + 3 55 + 73 - 73 18%");
// value = 324.86
// With Invalid Expressions handling
try {
const value = evalExpr("100 + (3 * 55");
} catch (e) {
// Will throw an exception for invalid expressions
console.error(e.message);
}
`
You can use basic operations (e.g. +, -, \*, /, %, ^ etc.) in you expressions.
- 175 + 40 + 18% = 253.7
- 10 + (100 - 100 \ 18%) \ 5 + 40 / 20 = 422
> _NOTE_: Floating points must be handled carefully. Use Number( to fix the digits after
> decimal point.
> This package supports TypeScript.
This is the default and only export from this package.
`typescript``
/**
* Evaluate numeric mathematical expression
@param string expression - The expression to evaluate ("24 + 65 3 - 48")
* @return number - The evaluated value.
*
* @throws Will throw an error if the expression in invalid.
*
* NOTE: When passing floating points, please handle the digits after decimal point
* e.g. 2 - 1.1 leads to 0.8999999999999999 intead of .9
*/
evalExpr(expressions: string)