How to format and print numbers with a specific number of decimal places in Go?

To format and print numbers with a specific number of decimal places in Go, you can use the fmt.Printf() or fmt.Sprintf() functions along with the formatting verbs. Here's an example:

package main

import "fmt"

func main() {
    num := 3.14159

    // Format and print with 2 decimal places
    fmt.Printf("%.2f\n", num)

    // Format and store as a string with 3 decimal places
    formattedNum := fmt.Sprintf("%.3f", num)
    fmt.Println(formattedNum)
}

Output:

3.14
3.142

In the example above, %.2f specifies that the number should be formatted with 2 decimal places, and %f is the formatting verb for floating-point numbers. You can change the number after the dot to adjust the number of decimal places.

You can also use fmt.Sprintf() to format the number as a string with a specific number of decimal places. In the example, %.3f specifies that the number should be formatted with 3 decimal places. The formatted number is then stored in the formattedNum variable and printed.