Logic & Computation Binary Tree Lecture 1
import java.util.Scanner;
public class Main {
public static void main(String args[]) {
// Out of bounds!!!
Scanner myScanner = new Scanner(System.in); //Your scanner initialized, use as you see fit.
/*
* The Scanner class allows us to take input from our console, instead of having to write our values to our code.
* As an example, instead of having to initialize an int to have it store the value of 10, which would look like:
* int x = 10;
* We can instead use the scanner class to make the int variable equal to the input that the scanner recieves
* int x = myScanner.nextInt();
*
* Scanners come with multiple functions to get specific types of values, as it needs to be specified
* I.E., int variables use the .nextInt() function to get values that are converted to the type Int
*
* How to use the scanner methods:
* (name of scanner).(name of method)
*
* int x = myScanner.nextInt();
*
* boolean isItTrue = coolScanner.nextBoolean();
*
* String wordy = takeMyInput.nextLine();
*
* What function to use with a scanner for each type of input:
*
* Int - nextInt();
* Double - nextDouble();
* String - nextLine();
* Char - next().charAt(0); You should have questions on this peculiar function
* Boolean - nextBoolean();
*/
//Before you proceed to the for loops, practice creating using the scanner when initializing variables
//For all variable types
//I.E., do something like int a = myScanner.nextInt();
//Then System.out.println(a); so you can see if your variable stored the value given to it by the scanner
//Do it for all variable types before proceeding
System.out.println("Enter a NATURAL number");
int x = myScanner.nextInt();
for(int i = 0; i < x; i++)
{
System.out.print(i + " ");
}
System.out.println();
int count = 0;
while(count < x)
{
System.out.print(count + " ");
count++;
}
System.out.println();
System.out.println("Enter the number of rows to be printed");
int rows = myScanner.nextInt();
// loop to iterate for the given number of rows
for (int i = 1; i <= rows; i++) {
// loop to print the number of spaces before the star
for (int j = rows; j >= i; j--) {
System.out.print(" ");
}
// loop to print the number of stars in each row
for (int j = 1; j <= i; j++) {
System.out.print("* ");
}
// for new line after printing each row
System.out.println();
}
//Out of bounds!!!
}
}
