Question

Repetition Loops Chapter 6 - Due Intro to Java Programming Section 141 Summer 2019 CO Compare the various loop structures with illustrations While Loop Do While Loops For Loops

Answer 1

there are mainly 3 types of loops are present in java.

java loops:

1.while loop:

if we don't know how many times exactly the loop need to be executed then we are going to use while loop.

it means while loop executes the block of code until the given condition in loop get false.

Syntax:

while(condition )

{

executes this block of code;

}

2.Do while loop:

this works as it as like as the while loop but it executes the block of code inside the loop atleast once.

Syntax:

do

{

executes the block of code;

}while(condition )

3.for loop:

this loop is used when we know how many times exactly the code inside the loop need to be executed.

Syntax:

for( initialization ; condition ; increment)

{

block of code;

}

int i=1; while(i<1) { System.out.println(i); 3 i++; 9 output No output because the condition(1<1) fails. 11 12 13 int i=1; do { System.out.println(i); i++; }while(i<1) output: 1 Because it get into the loop without checking condition and prints 1 and incremented to 2 and checks condition and fails. 21 23 24 25 26 for(int i=1;i<3;i++) { System.out.println(i); } output: 1 Because here i initializes to 1 and gets into the loop and prints 1 and incremented to 2 and (2<3) true so, again gets into loop and prints 2 and incremented to 3 and (33) condition fails so it gets stop.