Types of Control Statement in java

Posted by Gyan Guide on May 12th, 2017

A program executes from starting to ending except when we use control statements.Through control statement we control the order of execution of the program, on the basis of some logic and values.

In Java, We can divide the control statements into the following three categories:

1) Selection Statements

2) Iteration Statements

3) Jump Statements

Selection Statements :

Selection statements allow us to control the flow of program execution on the basis of the outcome of an expression or state of a variable java training center bangalore known during runtime.

We can divide it in-

- if statements

- if-else statements

- if-else-if statements

- switch statements

 The if statements :

if statement only executes when the specified condition is true. If the condition is false and there is not else keyword then the if statement will be skipped and execution continues with the rest of the program. The condition is an expression that returns a boolean value.

The if-else statements:

In if-else statements, if the specified condition in the if statement is true then if block will get executed and else part will skipped . Java/j2ee classes bangalore if the specified condition in if block is false then if block will get skipped and else block will get executed.

The if-else-if statements:

Also known as ladder if -else. This statement following the else keyword can be another if or if-else statement.

For example :

if(condition)
statements;
else if (condition)
statements;
else if(condition)
statement;
else
statements;

Whenever the condition is true, the associated statement will be executed and the remaining conditions will be skipped. If none of the conditions are true then the else block will get executed .

The Switch Statements

The switch statement is a multi-way branch statement . Advanced java training in bangalore The switch statement of Java is defines multiple paths of execution of a program. It provides a good alternative than a large series of if-else-if statements.

Iteration Statements

Repeating the same code partmultiple times until a specified condition is satisfied is called iteration. Iteration statements execute the same set of instructions until a termination condition is met.

Java provides the following loop for iteration statements:

1) for loop

2) while loop

3) do-while loop

4) for each loop

The for loop :

A for loop executes a block ofstatements multiple times till the boolean condition evaluates to true . Java course in bangalore A for loop is a combination of the three elements initialization statement, boolean expression and increment or decrement statement.

The while loop :

It executes a block of statements while a condition is true. The condition must return a boolean value. In while loop initial condition is unknown.

The do-while loop :

The only difference between a while and a do-while loop is that in do-while loop first executes the statements then check the condition . If the condition is false then also execute the statement once.

In while loop first check the condition then execute the block of statement.if condition false then never execute the block.Best core java training in bangalore

Labeled Break Statement: This is used for when we want to jump the program control out of nested loops or multiple loops.

Unlabeled Break Statement: This is used to jump program control out of the specific loop on the specific condition.

Continue Statement :

The continue statement is used when we want to continue running the loop with the next iteration and want to skip the rest of the statements of the body for the current iteration.

The continue statement has the two forms:

1) Labeled Continue Statement

2) Unlabeled Continue Statement

Labeled Continue Statement: java training center bangalore This statement skips the current iteration of the loop with the specified label.

Unlabeled Continue Statement:This statement skips the current iteration of the innermost for , while and do-while loop.

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