defer function

catchError.go

@@ -0,0 +1,21 @@
+package main
+import "fmt"
+
+func main() {
+	fmt.Println(safeDiv(6,0));
+	fmt.Println(safeDiv(6,3));
+}
+
+// create a function safeDiv to divide two numbers to generate an exception divide the number by zero and catch the exception using recover() function
+
+func safeDiv(num1, num2 int) int{
+	// to execute the recover() function at the end of completing division use defer keyword
+	// below function is used to catch an error if occurs
+	defer func() {
+		fmt.Println(recover())
+	}()
+
+	solution := num1 / num2;
+	return solution;
+
+} 

deferFunction.go

@@ -0,0 +1,14 @@
+package main
+import "fmt"
+
+func main() {
+	// defer key word is used to execute any function at the last or after the execution of all contents in the main
+	// here defer will execute printOne() function after printTwo() even the printOne function is written before the latter functions
+	// hence the defer is used for wrapping things up like closing a databse connection after the query executed successfully
+	// defer makes it confirm that the function will execute at the end after everything executed succesfully
+	defer printOne()
+	printTwo()
+}
+
+func printOne(){ fmt.Println(1) }
+func printTwo(){ fmt.Println(2) }