Create 22. Letter pyramid

Week 2: Methods, strings and lists/22. Letter pyramid

@@ -0,0 +1,145 @@
+Write a program that asks the user to enter the lower case letter [a-z].
+The program will then print a pyramid corresponding to the letter according to the example printouts shown below.
+
+Example execution:
+Give a lowercase letter: d
+   aa
+  baab
+ cbaabc
+dcbaabcd
+ 
+
+Another example execution:
+Give a lowercase letter: p
+              aa
+             baab
+            cbaabc
+           dcbaabcd
+          edcbaabcde
+         gedcbaabcdeg
+        hgedcbaabcdegh
+       ihgedcbaabcdeghi
+      jihgedcbaabcdeghij
+     kjihgedcbaabcdeghijk
+    lkjihgedcbaabcdeghijkl
+   mlkjihgedcbaabcdeghijklm
+  nmlkjihgedcbaabcdeghijklmn
+ onmlkjihgedcbaabcdeghijklmno
+ponmlkjihgedcbaabcdeghijklmnop
+
+
+
+
+
+
+import java.util.Random;
+import java.util.Scanner;
+
+
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+
+        // round 1
+        //ADD
+        // Scanner reader= new Scanner(System.in);
+        // System.out.print("Give a lowercase letter: ");
+        // // char user_char = Character.valueOf(reader.nextLine());
+        // char user_char = reader.next().charAt(0);
+
+        // char char_a = 'a';
+        // char char_loop = 'a';
+        // String str = "";
+        // while (char_loop <= user_char) {
+        //     str += char_loop;
+        //     char_loop++;
+        // }
+        
+        // char_loop = user_char-1;
+        // while (char_loop >= char_a) {
+        //     str += char_loop;
+        //     char_loop--;
+        // }
+
+        // System.out.println(str);
+
+        
+
+        // round 2
+        // // Calculate the number of rows needed
+        // int num_rows = user_char - 'a' + 1;
+        
+        // // Loop through each row
+        // for (int i = 0; i < num_rows; i++) {
+        //     // Print spaces in front
+        //     // eg
+        //     // 'c' - 'a' = 2
+        //     // num_rows = 3
+        //     // BUT we want 2 spaces in front
+        //     // so we do num_rows - i - 1
+        //     for (int j = 0; j < num_rows - i - 1; j++) {
+        //         System.out.print(" ");
+        //     }
+            
+        //     // Print decreasing letters
+        //     // row 1 - 'a'
+        //     // row 2 - 'ba'
+        //     // row 3 - 'cba'            
+        //     for (char c = 'a'+i; c >= 'a'; c--) {
+        //         System.out.print(c);
+        //     }
+            
+        //     // Print increasing letters
+        //     // start from 'a', print until user_char
+        //     for (char c = 'a'; c <= user_char; c++) {
+        //         System.out.print(c);
+        //     }
+
+        //     //no need to print spaces at the back
+        //     // just
+        //     // Move to the next line
+        //     System.out.println();
+        // }
+
+
+
+        // round 3
+        Scanner reader = new Scanner(System.in);
+        System.out.print("Give a lowercase letter: ");
+        // https://stackoverflow.com/questions/32798803/understanding-scanners-nextline-next-and-nextint-methods
+        // https://stackoverflow.com/questions/13942701/take-a-char-input-from-the-scanner
+        //char user_char = reader.next().charAt(0);
+        char user_char = reader.findInLine(".").charAt(0);
+        
+        // each row is a new line
+        // Loop through each character from 'a' to user_char
+        for (char current_char = 'a'; current_char <= user_char; current_char++) {
+            // Print leading spaces
+            // eg
+            // 'c' - 'a' = 2
+            // num_rows = 3
+            // BUT we want 2 spaces in front
+            for (int j = 0; j < (user_char - current_char); j++) {
+                System.out.print(" ");
+            }
+
+            // Print descending characters from currentChar down to 'a'
+            for (char c = current_char; c >= 'a'; c--) {
+                System.out.print(c);
+            }
+
+            // Print ascending characters from 'a' up to currentChar
+            for (char c = 'a'; c <= current_char; c++) {
+                System.out.print(c);
+            }
+
+            // Move to the next line
+            System.out.println();
+        }
+
+
+
+    }
+}