Conditionals in Go
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We use the if
statement to execute different instructions depending on a condition:
if age < 18 {
//underage
}
The else
part is optional:
if age < 18 {
//underage
} else {
//adult
}
and can be combined with other if
:
if age < 12 {
//child
} else if age < 18 {
//teen
} else {
//adult
}
If you define any variable inside the if
, that’s only visible inside the if
(same applies to else
and anywhere you open a new block with {}
)
If you’re going to have many different if statements to check a single condition it’s probably better to use switch
:
switch age {
case 0: fmt.Println("Zero years old")
case 1: fmt.Println("One year old")
case 2: fmt.Println("Two years old")
case 3: fmt.Println("Three years old")
case 4: fmt.Println("Four years old")
default: fmt.Println(i + " years old")
}
Compared to C, JavaScript and other languages you don’t need to have a
break
after eachcase
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