CODEWITHSUNDEEP
swift
Mig N.
Mig N.

Reputation: 53

Swift Variable Declaration and Initialize

Is there a difference between how following bits of code work?

let x: Int = 4

and

let x: Int
x = 4

Upvotes: 5

Views: 1657

Answers (2)

Ed King
Ed King

Reputation: 1863

This one:

let x: Int = 4

creates a non-optional variable x and initialises it to 4. x can be used without issue.

This one:

let x: Int
// Cannot do anything with x yet
x = 4

creates a non-optional variable x with no defined value. It cannot be used without first assigning it to a value, either directly (as in your example) or by the result of some other statement. If you do try and use it, you'll get a compile-time error.

Upvotes: 9

Mago Nicolas Palacios
Mago Nicolas Palacios

Reputation: 2591

The only difference is that on the first one you are declaring a variable and assigning it at the same time, and the second one you declare it first and then assign it.

But there is no mayor difference.

Upvotes: -1

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