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Returning a value of type int in the for loop will satisfy the type requirement because type int will be automatically converted to type double as it is returned. (Conversion from type int to type double is a widening conversion.)

Back to Question 14

Answer 13

A. Compiler Error

Explanation 13

The scope of a local variable

In general, the scope of a local variable extends from the point at which it is declared to the curly brace that signals the end of the block in which it isdeclared.

This applies to for loop in an interesting way

While it is allowable to declare a variable within the first clause of a for loop, the scope of that variable is limited to the block of code contained in the loop structure.

The variable cannot be accessed outside the loop.

Attempts to access variable out of scope

This program attempts to access the value of the variable named cnt after the loop terminates.

The program displays the following compiler error under JDK 1.3. This error results from the attempt to display the value of the counter after theloop terminates.

Ap037.java:15: cannot resolve symbol symbol : variable cntlocation: class Worker System.out.println(cnt + " ");

Back to Question 13

Answer 12

C. 0 1 2 3 4 5

Explanation 12

A simple for loop structure

This program illustrates a simple for loop that displays the value of its counter using a call to the print method inside the loop.

After the loop terminates, the program displays the value of the counter one last time using a call to println .

Three clauses separated by semicolons

The first line of a for loop structure always contains three clauses separated by semicolons.

The first and third clauses may be empty, but the semicolons are required in any case.

The first clause ...

The first clause is executed once and only once at the beginning of the loop.

It can contain just about any valid Java expression.

It can even contain more than one expression with the individual expression separated by commas.

When the first clause contains more than one expression separated by commas, the expressions are evaluated in left-to-right order.

The second clause

The second clause is a conditional clause. It must contain an expression that returns a boolean value.

(Actually, this clause can also be empty, in which case it is apparently assumed to be true. This leads to an infinite loop unless there is somecode inside the loop to terminate it, perhaps by executing a return or a break statement.)

An entry-condition loop

The for loop is an entry condition loop, meaning that the conditional expression is evaluated once immediately after the first clause isexecuted, and once per iteration thereafter.

Behavior of the for loop

If the conditional expression returns true, the block of code following the closing parenthesis is executed.

If it returns false, the block of code is skipped, and control passes to the first executable statement following the block of code.

(For the case where the block contains only one statement, the matching curly brackets can be omitted.)

The third clause

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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