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Laurie Cai
5,391 PointsHow to return boolean value from a function?
func isPositive(number: Int) -> Bool {
if number < 0 {
let isPositive = false
} else if number >= 0 {
let isPositive = true
}
return isPositive
}
isPositive(number: 6)
isPositive(number: -2)
The errors I'm getting are:
- Initialization of immutable value 'isPositive' was never used
- Cannot convert return expression of type '(Int) -> Bool' to return type 'Bool'
3 Answers
Laurie Cai
5,391 PointsFigured it out! Posting here in case it might help others:
func isPositive(number: Int) -> Bool {
if number < 0 {
return false
} else {
return true
}
}
james south
Front End Web Development Techdegree Graduate 33,271 Pointsi think the error is that your internal variable has the same name as the function itself. try a different variable name.
Laurie Cai
5,391 PointsChanged the function name:
func test(number: Int) -> Bool {
if number < 0 {
let isPositive = false
} else if number >= 0 {
let isPositive = true
}
return isPositive
}
The error returned is
- Use of unresolved identifier 'isPositive'
Inokentiy Kadilov
28,532 Pointsfunc isPositive(number: Int) -> Bool {
var isPositive = true
if number < 0 {
isPositive = false
} else if number >= 0 {
isPositive = true
}
return isPositive
}
isPositive(number: 6)
isPositive(number: -2)