Converting a string variable into Boolean, Integer or Float type in Golang

A guide on how to convert a string into Boolean, Integer, or Float types in Golang. This article will help you understand how to use Go's built-in functions to work with different data types.

In Go, we can use functions like strconv.ParseBool, strconv.Atoi, and strconv.ParseFloat to convert strings into different types such as Boolean, Integer, and Float. These are common and efficient methods to handle string input data.

Golang Code

package main

import (
    "fmt"
    "strconv"
)

func main() {
    // String variables to be converted
    strBool := "true"
    strInt := "123"
    strFloat := "123.45"

    // Convert to Boolean
    boolValue, err := strconv.ParseBool(strBool)
    if err != nil {
        fmt.Println("Error parsing boolean:", err)
    } else {
        fmt.Println("Boolean value:", boolValue)
    }

    // Convert to Integer
    intValue, err := strconv.Atoi(strInt)
    if err != nil {
        fmt.Println("Error parsing integer:", err)
    } else {
        fmt.Println("Integer value:", intValue)
    }

    // Convert to Float
    floatValue, err := strconv.ParseFloat(strFloat, 64)
    if err != nil {
        fmt.Println("Error parsing float:", err)
    } else {
        fmt.Println("Float value:", floatValue)
    }
}

Detailed explanation:

1. import "strconv": Imports the strconv package to use its string conversion functions.
2. strBool := "true", strInt := "123", strFloat := "123.45": Creates string variables with Boolean, Integer, and Float values.
3. strconv.ParseBool(strBool): Converts the string to a Boolean value.
4. strconv.Atoi(strInt): Converts the string to an Integer value.
5. strconv.ParseFloat(strFloat, 64): Converts the string to a Float value with 64-bit precision.
6. Error handling with err != nil: Prints an error message if the conversion fails.

Tips:

• Always check for errors after every conversion to ensure valid input data.
• Use appropriate precision for floating-point numbers (float32 or float64) to save resources.

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