Can you explain what error handling is and its significance in software development?

Error handling is a mechanism in programming that allows a program to respond correctly to unforeseen situations such as input errors, network issues, or incorrect data. In Go, errors are usually returned as separate values that need to be checked after a function call. This is important so that the program does not crash and can either fix the situation or report the error correctly.

Example of error handling in 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, 0)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }
    fmt.Println("Result:", result)
}

This approach increases the reliability and predictability of programs.