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Golang program to convert a specified numeric string into integer using strconv.Atoi() function

Here, we are going to learn how to convert a specified numeric string into integer using strconv.Atoi() function in Golang (Go Language)?
Submitted by Nidhi, on April 21, 2021 [Last updated : March 05, 2023]

Convert string to integer using strconv.Atoi() function in Golang

Problem Solution:

In this program, we will create a string with some initial value and then we will convert the numeric string into a string using strconv.Atoi() function. The strconv.Atoi() function returns two values, first converted integer value and other one is err. If the value of err is not nil, it means Atoi() function returns an error.

Program/Source Code:

The source code to convert a specified numeric string into an integer using strconv.Atoi() function is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

Golang code to convert string to integer using strconv.Atoi() function

// Golang program to convert a specified string into
// an integer using strconv.Atoi() function

package main

import "fmt"
import "strconv"

func main() {
	var str string = "-203"
	num, err := strconv.Atoi(str)

	if err != nil {
		panic(err)
	} else {
		fmt.Println("Num: ", num)
	}
}

Output:

Num:  -203

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the "fmt", "strconv" packages then we can use a function related to imported packages.

In the main() function, we created a str variable initialized with "-203". Then we converted the numeric string into an integer number strconv.Atoi() function. After that, we printed the result on the console screen.

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