In this tutorial, we will learn about if-else statements in Swift. We will cover the basics of conditional execution using if-else statements.
An if-else statement is a conditional statement that executes one block of code if a specified condition is true, and another block of code if the condition is false.
The syntax for the if-else statement in Swift is:
if condition {
// Code block to execute if condition is true
} else {
// Code block to execute if condition is false
}
The if-else statement evaluates the specified condition. If the condition is true, the code block inside the if statement is executed; otherwise, the code block inside the else statement is executed.
num
.num
.num
is even or odd.num
is even or odd.let num = 10
if num % 2 == 0 {
print("\(num) is even.")
} else {
print("\(num) is odd.")
}
10 is even.
str
.str
.str
starts with a specific value.let str = "Hello, world!"
if str.hasPrefix("Hello") {
print("String starts with 'Hello'.")
} else {
print("String does not start with 'Hello'.")
}
String starts with 'Hello'.
num
.num
.num
is positive or negative.num
is positive or negative.let num = -5
if num > 0 {
print("\(num) is positive.")
} else {
print("\(num) is negative or zero.")
}
-5 is negative or zero.