As java and c# is the advance version of C++. So, most of the syntax is same as C++. But there is some variation which we are dealing in this article.

Following are the difference in the syntax for the java:

How to see the output in java?

Java syntax   :        System.out.println("Hello Java")

C# syntax     :        console.writeline(“Hello C#”)      

C++ syntax   :        cout << “Hello C++”

C syntax       :        printf(“Hello”)

How to take input from the user?

Java:

Taking a string input

str1=System.console().readLine();

How to take the integer input

int a=Integer.parseInt(System.console().readLine()

C#

Taking a string input

String str1 =console.readline();

Taking an integer input:

Int num1= Convert (ToInt32 (console.readline());

 C++

Taking a string input

For a single word.

string str1; 
cin >> str1;

but for C++ spaces means extraction hence for entire line we need to write

following codes.

For this we need to declare the standard header.

#include <string>
 
String str1;
getline (cin,mystr); 
Converting to INT or Float 
Int num1 ; 
stringstream(str1) >> num1 
float num2; 
stringstream(str1) >> num2

Taking integer as an input

Taking a string input

int num1;
cin >> num2;
C programming
Char s = getchar();
 
Taking a interger input 
Int num1;
scanf(“/d”,&num1);
 
Here is the small program for the taking an input from the user and output
            
import java.io.*;
 
class Demo1 {
 
public static void main(String args[]) 
{
int a, b,c;
String str1;
System.out.println("Program start") ;
System.out.println("Enter the string");
str1=System.console().readLine();
System.out.println("Enter the 1st number \n");
a=Integer.parseInt(System.console().readLine());//converting char input to int
 
System.out.println("Enter the 2nd number \n")  ;
b=Integer.parseInt(System.console().readLine()); //converting char input to int
c=a+b;
System.out.println("output of string is : "+str1);
System.out.println("output of number is : "+c);
}
}

Array input

Java

Declaration for an  array can be done as follows:

dataType[] array1;
dataType array1[]; 
Giving limit to the array, by this syntax
dataType[] array1 = new dataType[arraySize];

C#

Declaration for an array can be done as follows:

datatype[] arrayName;   

Giving limit to the array, by this syntax

dataType[] array1 = new dataType[arraySize];

Note : dataType array1[]; (Note : This method is not used in C# it will give

compiler error.)

C++

Declaration for an array can be done as follows:

datatypetype arrayName [ arraySize ];

datatype[] arrayName; (Note : This method is not used in C++ it will give

compiler error.)

C

Declaration for an array can be done as follows:

datatypetype arrayName [ arraySize ];

datatype[] arrayName; (Note : This method is not used in C++ it will give

compiler error.)

Here is the small program in java to access array list.

import java.io.*; class Demo2 { public static void main(String args[]) { int[] num1=new int[5]; int i; System.out.println("Program start") ; for (i=0;i<5;i++) { System.out.println("Enter the number "); num1[i]=Integer.parseInt(System.console().readLine()); } for (int real : num1 ) { System.out.println(real); } } }