Hellow guys, welcom to Lingarajtechhub. Today we are going to discuss finding n-term natural numbers.
package com.control_loop.java; import java.util.Scanner; public class N_term_natural_number { public static void main(String[] args) { int n,i ; Scanner sc=new Scanner(System.in); n=sc.nextInt(); System.out.println(" Enter the first n natural numbers are : "+n); for(int i=1;i<=n;i++) { System.out.println(i); } } }
Line-1:
package com.control_loop.Java;
- It is a java package which is a collection of classes and this package is created in a java project(Homework_operator) .
- Here com.operators.java is the name of our package.
Line-2:
import java.util.Scanner;
Scanner is a class in java
. util package used for obtaining the input of the primitive types like int, double, etc. and strings .
Line-3:
public class N_term_natural_number
- Here “N_term_natural_number” is defined as a class which is a template used to create objects ,& to define object ,data type and method.
- It is defined as public because it can be accessed anywhere.
- It is the entry point to the application.
Line-4:
public static void main(String[] args);
- This is the main () method of our java program .
- Every java program must contain the main() method .
- Public : It is the access modifier of the main function which must be public so that the JRE can access and execute this method.
- If a method is not public then access is restricted and its showing error.
- Static : Static is a keyword in which the main method has to be static in which JVM can load the class into memory and call the main method without creating an instance .
- Void : It means no return types.
- Main() : It is a function.
- String [] args :String means collection of characters
- String[] args represents a collection of Strings ,that are separated by a space and can be typed into the program on the terminal directly
Line-5:
int n, i;
- Here we Declare 2 variables n ,i , which is integer type and int is a local variable.
Line-6:
Scanner Sc = new Scanner(System.in);
Here scanner is a class and Sc is the instance of the object which is the new Scanner. System.in is an argument.
Line-7:
n=sc.nextInt();
“n” is a variable that we take and sc is our instance name which is created for an object and nextInt() is a method of a Scanner object that reads in a string of digits or char and converts them into an int type.
Line-9
for(i=1; i<=n ; i++ )
- for(initialization; condition; increment/decrement)
It is used when we want to perform initialization,condition & increment/decrement in one single line.
Line-10:
System.out.println(i);
- It means System is a class name and out is an instance of the System println is to print a new line and “+” means cocardinate .