How Can I Evaluate Formulas in Go?

Evaluating Formulas in Go

In Go, evaluating a formula with predefined values requires the use of an external package, such as govaluate. This package provides a convenient method to evaluate formulas represented as strings.

To evaluate a formula, you can follow these steps:

1. Import the govaluate package:

   import "github.com/Knetic/govaluate"

2. Create a new evaluable expression from the formula string:

   expression, err := govaluate.NewEvaluableExpression("(x + 2) / 10")

3. Define a map of parameter values to be used in the evaluation:

   parameters := make(map[string]interface{}, 8)
   parameters["x"] = 8

4. Evaluate the expression using the parameter values:

   result, err := expression.Evaluate(parameters)

5. Check for errors and retrieve the result:

   if err != nil {
    // Handle error
   }
   fmt.Println(result)

This will print 1, as in the Python example.

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