How to do it...

1. Open the console and create the folder chapter03/recipe01.
2. Navigate to the directory.
3. Create the main.go file with the following content:

        package main

        import (
          "fmt"
          "strconv"
        )

        const bin = "00001"
        const hex = "2f"
        const intString = "12"
        const floatString = "12.3"

        func main() {

          // Decimals
          res, err := strconv.Atoi(intString)
          if err != nil {
            panic(err)
          }
          fmt.Printf("Parsed integer: %d\n", res)

          // Parsing hexadecimals
          res64, err := strconv.ParseInt(hex, 16, 32)
          if err != nil {
            panic(err)
          }
          fmt.Printf("Parsed hexadecima: %d\n", res64)

          // Parsing binary values
          resBin, err := strconv.ParseInt(bin, 2, 32)
          if err != nil {
            panic(err)
          }
          fmt.Printf("Parsed bin: %d\n", resBin)

          // Parsing floating-points
          resFloat, err := strconv.ParseFloat(floatString, 32)
          if err != nil {
            panic(err)
          }
          fmt.Printf("Parsed float: %.5f\n", resFloat)

        }

1. Execute the command go run main.go in the Terminal.
2. You will see the following output: