Can we use semicolon after while loop?

When you first start working with while statements, you might accidentally place a semicolon after the “while(true/false expression)” part of the statement such as shown below. The semicolon results in a null statement, a statement that does nothing.

Are the conditions inside a for loop separated by semicolons?

The for loop has 3 components, separated by semi-colons. The first component runs before the looping starts and is commonly used to initialize a variable. The second is a condition. The condition is checked at the beginning of each iteration, and if it evaluates to true, then the code in the loop runs.

What happens if there is a semicolon after for loop in Java?

for loop can execute only one code block or one statement, even empty ones. So semicolon here represents empty statement (statement which does nothing).

Are any command terminated with a semi colon?

3 Answers. Every command needs a semicolon (‘;’) at the end so the program knows that this is the end of the command, sometimes you need to stretch a command over more than one line so the semicolon comes at the end of the last line of this command. Scanner ; is a non-block statement.

Can you use a while loop without a semicolon?

You put semicolon after all statements, except the block statement. This is the reason that you place it after the while in do while , but not after the block in the while {…} . You also use it to terminate almost all declarations.

What are the three parts of a for loop which are separated by semicolons?

A for-loop combines all 3 parts of writing a loop in one line to initialize, test, and change the loop control variable. The 3 parts are separated by semicolons ( ; ). Each of the three parts of a for loop declaration is optional (initialization, condition, and change), but the semicolons are not optional.

When we can use semicolon?

Use a semicolon to join two related independent clauses in place of a comma and a coordinating conjunction (and, but, or, nor, for, so, yet). Make sure when you use the semicolon that the connection between the two independent clauses is clear without the coordinating conjunction.

What is the meaning of semicolon after while-loop?

Watch out: semicolons The problem is that the loop body is a semicolon, which is a do nothing statement. Watch out: else after while. A while-loop does not have an else part. When it ends, it just ends. So do not write while(test) { loop body } else { do something }

Why does the comment line not end with a semicolon?

Preprocessor directives are processed at relatively early stages of translation, before any syntax analysis begins, so at that stage there’s no such thing as “statement” yet. And, for this reason, there’s no meaningful rationale to demand ending the #include directive with a semicolon.