Control Flow in Java Programming

Core java OOPs Tutorial

Core Java Interview Materials

A program is a group of statements that are executed to achieve a 
task.Statements are executed in sequential form inside a program which 
are called sequential execution or sequential flow. however the normal 
flow of  program can be controlled by putting decision making statements
 in the program

A program is a group of statements that are executed to achieve a 
task.Statements are executed in sequential form inside a program which 
are called sequential execution or sequential flow. however the normal 
flow of  program can be controlled by putting decision making statements
 in the program.Statements that controlled the flow of program are 
called control flow statements.

java control statements are categories in to three java selection,java iteration and java jump statements.

Selection statements are: java support two selection statements if and switch case.

Iteration statements are: java support two iteration statements for while and do-while

Jump statements are : java support three jump statements break,continue, and return.

 Selection statements

1.IF
if(condition)
{ statement;}

Else if

if(condition)
{ statement;}
else if (condition)
{ statement;}
else if(condition)
{statement}
.......
2.Switch case

switch(expression){
case 1:value
statement sequence
break;
case 2
statement sequence
break;
default;
default statement sequence;
}

Iteration statements

1.For
 for( initialization;condition;iteration)
{body}

2.While
while(condition)
{
body of loop}

3 do while
do
{ 
body of loop
}
while(condition);

Jump statements
1. Break
is used to exit the loop
if(i==9)
break; // loop terminates over here

2.continue
continue statement make continue flow of loop.
for(i=0;i<=18;i++)
{
system.out.println(i+"");
}
if(i%6==0)
continue;

 if statement

public static void main(String arg[])
{
int x=5;
int y=7;
if(x>y)
{
System.out.println(x is greater than y);
}
}

If else statementint a= 6;
if(a%2==0)
{
System .out.println("This is a even number");
}
else
{
System .out.println ("This is not a even no or it is a odd number)
}


Switch Case

int month = 2;
switch(month)
{
Case 1:
System.out.println("january");
break;
Case 2:
System .out.println("february");
break;
Case:3
System.out.prinln("march");
break;
default:Syatem.out.println("invalid value");
break;
}


For statement

public static void main(String arg[])
for(a=0;a<=10;a++)
{
system .out.println("the number is:"+a);
}

While statement
public Static void main(arg[])
while(j<=10)
{
System .out.println("the number is:"+j);
j++;
} 

do while Statement


public static void main(String arg[])
{
int i=0;
do
{
 System.out.println("the number is :"+i);
}
while(i<=10);

Break statements
int num []={20,5,36,23,56};
int search=23;
for(int i=1 ;int i<= num.length;i++)
{
if(num[i]==search)
{
System.out.println( "the value is found");break;}
}

Continue statement
int num []={20,5,36,23,56};
int search=23;
for(int i=1 ;int i<= num.length;i++)
{
if(num[i]1==search)
{
continue;
}
if (found==search)
{
System.out.println( "the value is found");break;}
}