How to Fix strconv.atoi: parsing “”: invalid syntax in Golang

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The error “strconv.atoi: parsing “”: invalid syntax” in Golang occurs when the strconv.Atoi() function is called with an empty string as an argument.

The easy fix is for the error “strconv.atoi: parsing “”: invalid syntax” is to ensure that the string being passed to the strconv.Atoi() function is not empty.

The strconv.Atoi() function converts a string representation of an integer to its integer value.

An empty string cannot be converted to an integer; hence this error is raised.

Golang code that fixes the error

package main

import (
  "fmt"
  "strconv"
)

func main() {
  str := ""
  if len(str) == 0 {
    fmt.Println("Error: Empty string")
    return
  }
  num, err := strconv.Atoi(str)
  if err != nil {
    fmt.Println("Error:", err)
    return
  }
  fmt.Println("The integer value of", str, "is:", num)
}

Output

Error: Empty string

In the above code, we are using the strconv.Atoi() function to convert a string to an integer.

Before calling the Atoi() function, we check if the string is empty.

If it is, we print an error message “Error: Empty string” and return it from the function.

If the string is not empty, we call the strconv.Atoi() function and store the result in the num variable. If the conversion fails, the function returns an error, which we check for and print “Error: [error message]”.

If the conversion is successful, we print the result of the conversion, “The integer value of [string] is: [integer value]”.

Conclusion

Ensure that the string is passed to the strconv.Atoi() function is not empty to prevent the strconv.atoi: parsing “”: invalid syntax error in Golang.

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