Day 4
Loops
the ability to repeat some simple task billions of times every second is called Loops.
**For loop
let count = 1...10
for number in count {
print("Number is \(number)")
}
Ans:
Number is 1
Number is 2
Number is 3
Number is 4
....
Number is 20
With underscore(_)
for _ in 1...5 {
print("Saurabh")
}
Ans:
Saurabh
Saurabh
Saurabh
Saurabh
Saurabh
While Loop
A second way of writing loops is using while: give it a condition to check, and its loop code will go around and around until the condition fails.
var number = 1
while number <= 10 {
print(number)
number += 1
}
Ans:
1
2
3
4
5
..
10
Summary
1.Loops let us repeat code until a condition is false.
2.If you don’t need the temporary constant that for loops give you, use an underscore instead so Swift can skip that work.
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