Error Handling

In Go, error handling differs significantly from languages that use try/catch blocks. Go intentionally does not have try/catch mechanisms because it encourages a different approach to handling errors. Instead, functions in Go often return multiple values, where the last value is typically an error.

Example

run command

go run function/return_error.go

package main

import (
    "errors"
    "fmt"
)

func divide(a, b float64) (float64, error) {
    if b == 0 {
        return 0, errors.New("division by zero")
    }
    return a / b, nil
}

func main() {
    result, err := divide(10, 2)
    if err != nil {
        fmt.Println("Error:", err)
    } else {
        fmt.Println("Result:", result)
    }

    result, err = divide(10, 0)
    if err != nil {
        fmt.Println("Error:", err)
    } else {
        fmt.Println("Result:", result)
    }
}

output

Result: 5
Error: division by zero