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What happens if we want to iterate through items of an array? We can use a for
-in
loop!
The syntax looks like the following:
for item in array { // Loop body }
For example, suppose we have a String
array that looks like this:
var employees = ["Michael", "Dwight", "Jim", "Pam", "Andy"]
We can write a for
-in
loop like so:
for item in employees { print(item) } // Prints "Michael" // Prints "Dwight" // Prints "Jim" // Prints "Pam" // Prints "Andy"
This is a powerful tool for working with and manipulating a large amount of data.
Instructions
1.
Here are the orders from a receipt. Let’s do some calculations.
First, create a variable called total
of type Double
and give it a value of 0.0
.
2.
Iterate through receipt
using a for
-in
loop and call the iterator variable item
.
And add each item
to total
.
3.
There’s an 8.875% sales tax in New York.
Change the value of total
by multiplying itself by 1.08875
.
4.
Finally, print the value of total
.
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