Code Syntax - 1 -

Question 1

Ouput

Answer 1

System.out.println(“ “);

Question 2

First statement to start the program

Answer 2

public class <class_name>{
public static void main(String[] args){</class_name>

Question 3

Single-line Comment

Answer 3

//Comments…..

Question 4

Multi-line Comment

Answer 4

/* Comments
Comments
Comments*/

Question 5

Declare a variable

Answer 5

<data_type> <variable_name>;

<data_type> <variable_name> = <value>;

We should end the value with L for long , F for float, and D for double
</value></variable_name></data_type></variable_name></data_type>

Question 6

Widening Casting

Answer 6

converting a smaller type to a larger type size byte -> short -> char -> int -> long -> float -> double

Question 7

Narrowing Casting

Answer 7

onverting a smaller type to a larger type size
double -> float -> long -> int -> char -> short -> byte

Question 8

Switch

Answer 8

switch (x)
{
case a:
code block
break;
case b:
code block
break;
default:
code block
break;
}

Question 9

Java break/continue

Answer 9

“Break” is used to stop the loop when it meets thecondition
“Continue” is used to skip one iteration of the loop and then continue the loop till the end.

Question 10

Array declartion

Answer 10

<data_type>[] <variable_name>;

<variable_name> = new <data_type>[length];

<data_type>[] <variable_name> = new <data_type> [length];
</data_type></variable_name></data_type></data_type></variable_name></variable_name></data_type>

Question 11

Array initialization

Answer 11

<data_type>[] <variable_name> = {a[1], a[2], a[3],...};
</variable_name></data_type>

Question 12

2D-array declaration

Answer 12

<data_type>[][] <variable_name>;<variable_name> = new <data_type>[length][length];

<data_type>[] <variable_name> = new <data_type> [length][length];
</data_type></variable_name></data_type></data_type></variable_name></variable_name></data_type>