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?

Explain break statement in a loop, Explain break statement in a loop ? ...

Explain break statement in a loop ? A break statement exits a loop before an entry condition fails. For instance, in this variation on the CountWheat program an error messa

Javascript work, It could be something simple for a good js coder. But ther...

It could be something simple for a good js coder. But there may be a custom design and I can give more feedback for the person who is interested in working with me. Check Invisi

State the java virtual machine and runtime environment, Java Virtual Machin...

Java Virtual Machine & Runtime Environment Basic Concept When you write a program in C++ it's called source code. C++ compiler converts this source code into the machine c

Whatsapp bulk messenger to unlimited numbers, hi,i need whatsapp panel to s...

hi,i need whatsapp panel to send unlimitd message. skype : maya123.com email :

What is mvc, Model-View-Controller (MVC) is a design pattern put together t...

Model-View-Controller (MVC) is a design pattern put together to help control change. MVC decouples interface from business logic and data. ? Model: The model having the core of

Brute force search, how to implement brute foce in a program?

how to implement brute foce in a program?

Implementation of Kruskal’s Algorithm, • A Graph Data Type (including a dis...

• A Graph Data Type (including a display method to show adjacencies) • A Cycle Checker (as described in lecture notes) • An Edge class • A sorting algorithm to sort an array of Edg

Assingment, hi i want to get my assingment done

hi i want to get my assingment done

Explain the coordinate system, Explain the Coordinate System? Java uses...

Explain the Coordinate System? Java uses the standard, two-dimensional, computer graphics coordinate system. The first visible pixel in the upper left-hand corner of the applet

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