Software Engineering

3. Scanner import java.util.Scanner; public class App{ public static void main(String[] args) { //create scanner object Scanner input = new Scanner(System.in); //output the prompt System.out.println("Enter a number: "); //wait for the user to enter a number int num = input.nextInt();         //output System.out.println("you entered: "+num); } } Output : User Input Note:1. For: String line = input.nextLine(); and  Double value = input.nextDouble(); And 2. Always save java program as (In this case: App.java) class name.java.

Write a program to print hello.    /* This is use to write comment multiplication and slash */ #include<iostream>     /* header file library for visual C++ programming*/   using namespace std;                        /*The new feature in c++ for standard name space*/  int main()                                                    /* Main function of program*/ {                                                                             /*opening curly braces for function main*/  cout <<"Hello World ! \n"   /*cout is use as called out or display output with  << "string"syntax; \n is valid  C++ syntax for newline */  return 0; /*This is the termination point of program*/ } /*closing curly braces for function main*/ OUTPUT: Hello World !