In this tutorial, you will learn about Swift comments, why and how to use them.
In computer programming, comments are hints that we use to make our code more understandable.
Comments are totally disregarded by the compiler. They are meant for fellow programmers.
Documentation is a critical and significant important in coding. At the point when we write coding, in the event that we can add a note to reminder ourself, it will be extremely useful while examining the code at later time.
There are two different ways to add comments in Swift:
- // – Single Line comments
- /…/ – Multiline Comments
Single Line Comment
In Swift, any line that begins with//is a single line comment. For instance,
// create a variable var name = "Sohail" // print the value print(name)
Here, we have created two single-line comments:
- // create a variable
- // print the value
We can likewise use the single-line comment alongside the code.
var name = "swift" // name is a string
In Swift, any content between/* and */is a multiline comment. For instance,
/* create a variable to store salary of employees */ var salary = 10000 print(salary)
In the above example, we have used/*…*/to write the comment that extends out for numerous lines.
Use of Swift Comment
1. Make Code Easier to Understand
On the off chance that we write comments in our code, it will be simpler for future reference.
Likewise, it will be simpler for other developers to comprehend the code.
2. Using Comments for debugging
On the off chance that we get an error while running the program, we can comment the line of code that causes the error instead of eliminating it. For instance,
print("Swift") // print("Error Line ) print("UIKit")
Here, print(“Error Line) was causing an error so we have changed it as the comment. Presently, the program runs with no error.
This is the means by which comments can be an important debugging tool.
Note: Always use comments to clarify why we accomplished some different options from how we accomplished something. Comments shouldn’t be the substitute for the way to clarify poorly written code.
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