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The Way to Go

Solution Review: Generate Panic from Division by 0

Explore how to handle runtime panics in Go by generating a panic from a division by zero scenario. Understand how to use deferred anonymous functions to recover from panics and control program flow during error-handling and testing.

We'll cover the following...
Go (1.6.2)
package main
import (
	"fmt"
)
func badCall() {
  a, b := 10, 0
  n := a / b   // it will cause panic as it's a division by 0
  fmt.Println(n)
}
func test() {
   defer func() { 
    if e := recover(); e != nil {
       fmt.Printf("Panicking %s\r\n", e);
    }
   
    }()
    badCall()  
    fmt.Printf("After bad call\r\n"); // It won't be called, because we just recovered from an error
}
func main() {
   fmt.Printf("Calling test\r\n"); 
   test()   // calling test function
   fmt.Printf("Test completed\r\n"); 
}

Following the proposed schema, we call test() from the main() at line 25. The function test() first defers an anonymous function call at ...