Conclusion: while(j>10); Adding semi-colon for while-loop ends the line. The code in the curly braces executes irrespective of the condition is true or false. Therefore adding the semicolon executes the empty statements without any errors.
What happens if we put 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.
Do you use a semicolon in a while loop?
while’ loop syntax needs a semicolon at the end. Whereas for and while loop do not need a semi-colon terminator at end.
What happens if we put semicolon after if statement in Java?
It’s the semicolon! if you put a semicolon directly after the condition in an if statement, Java thinks it’s finished with the body of the statement. The indentation of the next line, which is so important to human readers, is ignored by Java.
Is there a semicolon after while?
However in the case of do-while since the body comes first,we specify a semicolon after a while because it marks the end of the while block. A statement ends either with a block (delimited by curly braces), or with a semicolon.
What is a loop that never ends?
An infinite loop is a sequence of instructions in a computer program which loops endlessly, either due to the loop having no terminating condition, having one that can never be met, or one that causes the loop to start over. … Busy wait loops are also sometimes called “infinite loops”.
Which statement must not end with 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 is the purpose of the colon at the end of the while statement?
General Syntax of While Loops
A condition to determine if the loop will continue running or not based on its truth value ( True or False ). A colon ( : ) at the end of the first line. The sequence of statements that will be repeated. This block of code is called the “body” of the loop and it has to be indented.
What is the reason why there is no semicolon after the test expression?
Omitting the semicolon at the end of a statement is a syntax error. The computer issues an error message when it cannot recognize the statement. These messages can occur at the point of the error, or after it.
Why does a semicolon cause a logic error if placed immediately after the right parenthesis of an if statement?
Placing a semicolon immediately after the right parenthesis after the condition in an if statement is often a logic error (although not a syntax error). The semicolon causes the body of the if statement to be empty, so the if statement performs no action, regardless of whether or not its condition is true.
Can I put if inside if statement?
Yes, both C and C++ allow us to nested if statements within if statements, i.e, we can place an if statement inside another if statement.
What does Colon do in Java?
It means one thing, it is an enhanced for loop. When you see the colon (:), read it as “in.” Thus, the loop above reads as “for each element e in elements.” Note that there is no performance penalty for using the for-each loop, even for arrays.
What loops will always execute at least once?
In the do-while loop, the body of a loop is always executed at least once. After the body is executed, then it checks the condition. If the condition is true, then it will again execute the body of a loop otherwise control is transferred out of the loop.