package main
import (
"fmt"
)
func main() {
comment := map[string]string{
"route53": "Love it",
"s3": "",
"ec2": "oh!",
"Snowball Edge": "Urban Dictionary both of those words.",
"fargate": "Sounds clever, but nobody will know what it does.",
"graviton": "Terrific if the next word in the product name is 'bomb'",
}
// Uncomment one on these three lines
name := "ec2"
// name := "route53"
// name := "s3"
if len(comment[name]) > 4 {
fmt.Println("Clever comment for: ", name, " - ", comment[name])
} else if len(comment[name]) > 0 {
fmt.Println("Short comment for: ", name)
} else {
fmt.Println("No comment for: ", name)
}
}
1 package main
2
3 import (
4 "fmt"
5 )
6
7 func main() {
8 comment := map[string]string{
9 "route53": "Love it",
10 "s3": "",
11 "ec2": "oh!",
12 "Snowball Edge": "Urban Dictionary both of those words.",
13 "fargate": "Sounds clever, but nobody will know what it does.",
14 "graviton": "Terrific if the next word in the product name is 'bomb'",
15 }
16
17 // Uncomment one on these three lines
18 name := "ec2"
19 // name := "route53"
20 // name := "s3"
21
22 if len(comment[name]) > 4 {
23 fmt.Println("Clever comment for: ", name, " - ", comment[name])
24 } else if len(comment[name]) > 0 {
25 fmt.Println("Short comment for: ", name)
26 } else {
27 fmt.Println("No comment for: ", name)
28 }
29
30 }
Uncomment one of the lines 18,19,20 and run the program.
So there are not many surprises with if:
22 if len(comment[name]) > 4 {
23 fmt.Println("Clever comment for: ", name, " - ", comment[name])
24 } else if len(comment[name]) > 0 {
25 fmt.Println("Short comment for: ", name)
26 } else {
27 fmt.Println("No comment for: ", name)
28 }
Multiple if-else statements can be written with the switch statement. This is described in the next chapter.
See the full source on github.