What are the flow control statements in java? , JAVA Programming

Assignment Help:

The flow control statements give you to conditionally execute statements, to repeatedly operate a block of statements, or to just modify the sequential flow of control.

Looping

while, do-while, for

 

The body of the while loop is run only if the expression is true, so it cannot be executed even once:

 

while(i < 5){...}

 

The body of the do-while loop is run at least once because the test expression is evaluated only  after executing  the  loop  body.  Also, don't  forget  the  ending  semicolon  after  the  while expression.

 

do { ... } while(i < 5);

 

The for loop syntax is:

 

for(expr1; expr2; expr3)

{

// body

}

 

expr1 Æ is for initialization, expr2 Æ is the conditional test, and expr3 Æ is the iteration expression. Any of these sections may be omitted and the syntax will still be legal:

 

for( ; ; ) {} // an endless loop

Decision making

if-else, switch-case

 

The if-else statement is used for decision-making -- that is, it decides which course of action have to be taken.

 

if (x == 5) {...} else {..}

 

The switch statement is also used for decision-making, based on an integer expression. The argument passed to the switch and case statements could be int, char, short, or byte. The argument passed to the case statement could be a literal or a final variable. If no case matches, the default statement (which is optional) is executed.

 

int i = 1;

switch(i)

{

case 0:

System.out.println("Zero");break; //if break; is omitted case 1: also executed

case 1:

System.out.println("One");break; //if break; is omitted default: also executed

default: System.out.println("Default");break;

}

Branching

break, continue, label:, return

 

The break statement is needed to exit from a loop or switch statement, while the continue statement is needed to skip just the current iteration and continue with the next. The return is used to return from a function based on a condition. The label statements may lead to unreadable and unmaintainable spaghetti code hence should be avoided.

Exception handling

try-catch-finally, throw

 

Exceptions may be used to define ordinary flow control. This is a misuse of the idea of exceptions, which are meant only for exceptional conditions and hence should be avoided.

 


Related Discussions:- What are the flow control statements in java?

Legal responsibility of nurses, As registered nurses, we often wonder "am I...

As registered nurses, we often wonder "am I responsible for the L.P.N's and the C.N.A. assigned on my floor.  Will I be blamed if someone makes an error or if someone gets hurt?  N

Connect 4 game application, This assignment is a good project for working w...

This assignment is a good project for working with 2 dimensional arrays. In this program, you will implement an ascii version of the classic game "Connect 4". Connect 4 is a 2 p

Describe the life cycle methods of a jsp? , 1. Pre-translated: Before the...

1. Pre-translated: Before the JSP file has been compiled and translated into the Servlet. 2. Translated: The JSP file has been compiled and translated as a Servlet. 3. I

What is a jointpoint, A joinpoint is a point in the implementation of the a...

A joinpoint is a point in the implementation of the application where an aspect can be plugged in. This point could be a method being called, an exception being thrown, or even a f

What is jdbc abstraction and dao module, Using this module we can keep up t...

Using this module we can keep up the database code clean and easy, and prevent problems that result from a failure to close database resources. A new layer of meaningful exceptions

Explain multiple initializers and incrementers, Explain Multiple Initialize...

Explain Multiple Initializers and Incrementers ? Sometimes it's essential to initialize several variables before starting a for loop. Similarly you may need to increment more t

Function and array in java script, Specifications 1. readNumberOfEntri...

Specifications 1. readNumberOfEntries → This function will ask the user for a value greater than or equal to two. The function will keep asking values as long as the user prov

How to implementing interfaces in java, How to Implementing Interfaces in j...

How to Implementing Interfaces in java? To actually utilize this interface you create a class that involves a public double calculateTariff() method and declare in which the cl

Data structure of different delimiters, In this experience you will make th...

In this experience you will make the neophyte Java programmer happy by solving, to a limited extent, an age-old problem in programming:  mismatched delimiters.  As we all know, eve

Describe life cycle of thread, Describe life cycle of thread. Threads f...

Describe life cycle of thread. Threads follow the single flow of control. A thread is execution in a program. The life cycles of threads are listed below: Newborn state: A

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd