Loop control Statements: -
There are three types of loop
control statements
1) For Loop 2)
While Loop 3) Do While Loop
1) For Loop: -
The initialization statement is executed only once at the
beginning of the For loop then the test expression is checked If the test
expression is false, for loop is terminated/exit.
Syntax:- for (Initialization; Condition;
Increment/decrement)
{
{
statements;
}
Example 1: -
Write a program for Table using for loop
class ForLoopExample
{
public static void main(String args[])
{
int i, n = 4;
for(i=1;i<=10;i++)
{
System.out.println(n +"*" + i +"="+
n*i);
}
}
}
Output:-
4x1=4
4x2=8
4x3=12
4x4=16
4x5=20
4x6=24
4x7=28
4x8=32
4x9=36
4x10=40
2) While Loop: -
While loop checks whether the test condition is true or
false if it is true, code inside the braces { } are executed. Then again the
test expression is checked whether test condition is true or false if it is
false, then loop exit
Syntax:-
while (Test Condition)
{
{
Statement;
}
Example: -
Write a program to print counting
using while statement
class WhileLoop
{
public static void main(String args[])
{
int i = 1;
while(i<=10)
{
System.out.println(i);
i++;
}
}
}
OUTPUT:-
1
2
3
4
5
6
7
8
9
10
3) Do While Loop: -
In do while statement inside body of code is executed then
the test condition is checked. If it is true code inside the braces { } are
executed. Then again the test expression is checked whether test condition is
true or false if it is false, then loop exit
Syntax:-
do
{
Statement;
}
while (Test Condition);
while (Test Condition);
Example: -
Write a program to print table
using do while statement.
class DoWhile
{
public static void main(String args[])
{
int n =5,
i=1;
do
{
System.out.println(n+"*"+i+"="+n*i);
i++;
}
while(i<=10);
}
}
OUTPUT:-
5*1=5
5*2=10
5*3=15
5*4=20
5*5=25
5*6=30
5*7=35
5*8=40
5*9=45
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