This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
This tutorial belongs to the Swift series
if statements are the most popular way to perform a conditional check. We use the if keyword followed by a boolean expression, followed by a block containing code that is ran if the condition is true:
let condition = true
if condition == true {
// code executed if the condition is true
}An else block is executed if the condition is false:
let condition = true
if condition == true {
// code executed if the condition is true
} else {
// code executed if the condition is false
}You can optionally wrap the condition validation into parentheses if you prefer:
if (condition == true) {
// ...
}One thing that separates Swift from many other languages is that it prevents bugs caused by erroneously doing an assignment instead of a comparison. This means you can’t do this:
if condition = true {
// The program does not compile
}and the reason is that the assignment operator does not return anything, but the if conditional must be a boolean expression.
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-05-22T05:00:00+00:00) Swift Conditionals: `if`. Retrieved from https://www.scien.cx/2021/05/22/swift-conditionals-if/
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