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Does Scala require semicolon?
Scala semicolons A semicolon or semi-colon (;) is a punctuation mark in programming, it is used to separate multiple lines of code. But, in Scala, the end of the line is treated as the end of the expression. This means the user does not need to compulsorily use the semicolon (;) statement.
Why you shouldn’t use semicolons?
The semicolon has two jobs, one pretty bad, one terrible. First, semicolons can be used to separate items that are too unwieldy to be handled by mere commas. Here’s the rule: Whenever you have two “closely related” clauses, you can join them with a semicolon instead of separating them with a period.
Which statement does not require a semicolon?
Control statements ( if , do , while , switch , etc.) do not need a semicolon after them, except for do while , must have a semicolon after it.
What does <- mean in Scala?
=> is syntactic sugar for creating instances of functions. Recall that every function in scala is an instance of a class. () => T is the type of a function that takes no arguments and returns a T . It is equivalent to Function0[T] .
Why there is no semicolon in Python?
It is NOT PYTHONIC. Python is supposed to be clean and readable. Syntactic characters like semi-colons add unnecessary clutter. If you send a code like this to an experienced Python programmer, you will never hear the end of it.
What does this do in scala?
We use the this keyword when we want to introduce the current object for a class. Then using the dot operator (.), we can refer to instance variables, methods and constructors by using this keyword. this keyword is also used with auxiliary constructors.
What does the underscore mean in scala?
Scala allows the use of underscores (denoted as ‘_’) to be used as placeholders for one or more parameters. we can consider the underscore to something that needs to be filled in with a value. Multiple underscores means multiple parameters and not the use of same parameter repeatedly.
What is the role of semicolon in Scala?
Semicolon plays a vital role in all the programming language by marking the end of the statement. But Semicolon in Scala, not only marks the end of the statement but also the end of the expression. Scala’s syntax encourages clear and concise code, so it is necessary to use Semicolon properly whenever needed.
What is the purpose of semicolon in SQL?
Semicolon in SQL allows the user to execute the program in the same call by separating the statements in the database. SQL has a unique feature of adding Semicolon by default to terminate the statements. Semicolon is a statement terminator which is purely used to identify the end of a statement.
When do you not need a semicolon in Pascal?
There is no need for a direct Semicolon before else in Pascal. Also, the last statement before the end of the code/program doesn’t need a Semicolon. Pascal needs Semicolon when statements are written in a sequence. Pascal doesn’t need Semicolon for a case or a block and also before the keyword.
Why do we not use semicolons in Python?
Python doesn’t use Semicolons but it is not restricted. In Python, Semicolon is not used to denote the end of the line. Python is called the simple coding language because there is no need to use Semicolon and if we even forget to place, it doesn’t throw an error.