When you are in a crossroad and you choose to turn right and you see the pizza restaurant. that is condition and what your decision and that you get.
Let's we write how go write their code
Write Condition: if
Our decision is to turn right and we see the pizza restaurant.
package main
import "fmt"
func main() {
turn := "right"
if turn == "right" {
fmt.Println("Pizza restuarant")
}
}
we use if
to make condition if the value is true then the block {...}
will be execute.
turn == "right"
will return bool type true
or false
package main
import "fmt"
func main() {
if true {
fmt.Println("Always True")
}
}
Write Condition: else
Okay it just turn right but in the other side we see school how we go there. we could use else
package main
import "fmt"
func main() {
turn := "left"
if turn == "right" {
fmt.Println("Pizza restaurant")
} else {
fmt.Println("School")
}
}
It will check is turn
equal with "right"
if not it will go to else
and execute block else {...}
else
have to write as } else {
or you will get error compiler
package main
import "fmt"
func main() {
turn := "right"
// It will get error compiler
if turn == "right" {
fmt.Println("Pizza restaurant")
}
else {
fmt.Println("School")
}
}
Write Condition: elseif
But wait no it is not other side, I want more specific what if I turn somewhere.
package main
import "fmt"
func main() {
turn := "left"
if turn == "right" {
fmt.Println("Pizza restaurant")
} else if(turn == "left") {
fmt.Println("Gas station")
} else {
fmt.Println("School")
}
}
There more operator logic you can use on if
condition
Operator | Mean |
---|---|
== | equal |
!= | not equal |
! | not |
&& | and |
< | less than |
> | greater than |
<= | less than or equal |
>= | greater than or equal |
Is the data type just string
value, NO. you can give condition with any data type
package main
import "fmt"
func main() {
if 17 < 20 {
fmt.Print("17 is less than 20")
} else {
fmt.Print("17 is greater than 20")
}
}
Write condition: Switch
But is more complex imagine you look at street sign and what you can see? yeah the direction of the road.
you can convert if
condition we have wrote before to switch
condition
package main
import "fmt"
func main() {
turn := "right"
switch(turn) {
case "right" :
fmt.Println("Pizza restaurant")
case "left" :
fmt.Println("School")
default:
fmt.Println("Gas station")
}
}
switch
is a function that can write condition with a variable the example use turn
variable, and the condition actually use ==
equal.
case
will check is value of turn
variable is equal to "right". and if it not equal then will check the case "left"
.
if all conditions were not equal, so default
will run.
don't forget to add :
at the end of case
or you will get error compiler.
Conclusion
We have created condition with two different functions and when we use if
condition and when we use switch
condition is up to you, but it look at the complexity and the logic in that condition.
if
condition, you can give more logic !, !=, == , &&, ||
but in switch
you cannot use them.
Question:
Write these line in if
and switch
conditions
if your age is 17 you have to get milk shake license
if not you can't get milk shake license
Top comments (0)