Wrote function to print an error and exit the program

errors.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func printAndExit(errorStr string) {
+	fmt.Printf("ERROR: %s\n", errorStr)
+	os.Exit(1)
+}