Did (unofficially) the Number Names project from karan/Projects (under the name NumberName) in Java

1 files changed, 120 insertions, 0 deletions

diff --git a/Java/Beginer training/src/NumberName.java b/Java/Beginer training/src/NumberName.java
new file mode 100644
index 0000000..34f735c
--- /dev/null
+++ b/Java/Beginer training/src/NumberName.java
@@ -0,0 +1,120 @@
+import java.util.ArrayList;
+import java.math.*;
+import java.util.Scanner;
+
+public class NumberName {
+    public static void main(String args[]){
+        //Used http://www.englishlessonsbrighton.co.uk/saying-large-numbers-english/ and https://www.grammarly.com/blog/hyphen-in-compound-numbers/
+        Scanner scn = new Scanner(System.in);
+
+        System.out.println("Number to British English text");
+        System.out.println("How to use: type a whole number, press enter and the program will say it's full proper name. Close the program to stop it.");
+        System.out.println("NOTE: Your numbers must be between 2147483647 and -2147483648 (any characters that are not numbers and - will result in error)");
+
+        while (true) {
+            try {
+                int n = Integer.parseInt(scn.nextLine().trim());
+                System.out.println(NameOfNumber(n));
+            } catch (Exception ex) {
+                System.out.println("ERROR: Please type a whole number between 2147483647 and -2147483648 (NOTE: any characters that are not numbers and - will result in this error)");
+            }
+        }
+    }
+
+    public static String NameOfNumber(int num) {
+        StringBuilder name = new StringBuilder(num < 0 ? "negative " : "");
+        var number_parts = new ArrayList<Integer>();
+
+        while (num != 0) {
+            number_parts.add(Math.abs(num % 1000));
+            num /= 1000;
+        }
+
+        for (int i = number_parts.size() - 1; i > -1; i--){
+            int curr_num = number_parts.get(i);
+
+            if ((curr_num + "").length() == 3) {
+                name.append(SmallNumName(curr_num / 100)).append(" hundred");
+
+                curr_num %= 100;
+                if (curr_num != 0) name.append(" and ");
+            }
+            name.append(SmallNumName(curr_num));
+
+            switch (i) {
+                case 1: if (number_parts.get(1) != 0) {
+                            name.append(" thousand");
+
+                            if (number_parts.get(0) != 0) {
+                                if (number_parts.get(0) / 100 == 0) name.append(" and ");
+                                else name.append(", ");
+                            }
+                        } break;
+
+                case 2: if (number_parts.get(2) != 0) {
+                            name.append(" million");
+
+                            if (number_parts.get(0) != 0 || number_parts.get(1) != 0) {
+                                if (number_parts.get(1) / 100 == 0) name.append(" and ");
+                                else name.append(", ");
+                            }
+                        } break;
+
+                case 3: if (number_parts.get(3) != 0) {
+                            name.append(" milliard");
+
+                            if (number_parts.get(0) != 0 || number_parts.get(1) != 0 || number_parts.get(2) != 0) {
+                                if (number_parts.get(2) / 100 == 0) name.append(" and ");
+                                else name.append(", ");
+                            }
+                        } break;
+            }
+        }
+        return name.toString();
+    }
+
+    private static String SmallNumName(int num) {
+        int part = 1;
+        switch (num) {
+            case 0: return "";
+            case 1: return "one";
+            case 2: return "two";
+            case 3: return "three";
+            case 4: return "four";
+            case 5: return "five";
+            case 6: return "six";
+            case 7: return "seven";
+            case 8: return "eight";
+            case 9: return "nine";
+
+            case 10: return "ten";
+            case 11: return "eleven";
+            case 12: return "twelve";
+            case 13: return "thirteen";
+            case 15: return "fifteen";
+            case 18: return "eighteen";
+            case 14:                part = 4;
+            case 16: if (part == 1) part = 6;
+            case 17: if (part == 1) part = 7;
+            case 19: if (part == 1) part = 9;
+                return SmallNumName(part) + "teen";
+        }
+
+        if (num > 19 && num < 100) {
+            int f_digit = num / 10;
+            StringBuilder name = new StringBuilder();
+
+            switch (f_digit) {
+                case 2: name.append("twenty"); break;
+                case 3: name.append("thirty"); break;
+                case 4: name.append("forty"); break;
+                case 5: name.append("fifty"); break;
+                case 8: name.append("eighty"); break;
+
+                default: name.append(SmallNumName(f_digit)).append("ty"); break;
+            }
+            return num % 10 != 0 ? name + "-" + SmallNumName(num % 10) : name.toString();
+        }
+        return "ERR";
+    }
+}