Coding Trotters Challenge 2016- Alejandro Salvador Vega Nogales entry

README.md

@@ -37,3 +37,6 @@ int_to_word(200017)   == "two hundred thousand seventeen"
 int_to_word(784)      == "seven hundred eighty four"
 int_to_word(1000215)  == "one million two hundred fifteen"
 ```
+
+## Very Small Change:
+- added 'and' in the output phrase where appropriate. Felt more natural

trotters.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python
+# int to word. codetrotters
+# Alejandro Salvador Vega Nogales, [email protected], git: asvnpr
+def intToWord(n):
+    if (n == 0):
+        return "zero"
+    else:
+        # commence string building and component declaration
+        ones = {1: "one", 2: "two", 3: "three", 4: "four", 5: "five", 6: "six", 7: "seven", 8: "eight", 9: "nine" }
+        teens = {11: "eleven", 12: "twelve", 13: "thirteen", 14:"fourteen", 15: "fifteen", 16: "sixteen", 17: "seventeen", 18: "eighteen", 19: "nineteen"}
+        tens = {1: "ten", 2: "twenty", 3: "thirty", 4: "forty", 5: "fifty", 6: "sixty", 7: "seventy", 8: "eighty", 9: "ninety" }
+        others = ["hundred", "thousand", "million"]
+        digits = []
+        build = []
+        word = ""
+        numStr = str(n) #convert int num to String
+        if (n < 0):
+            numStr = numStr[1:]
+        l = len(numStr)
+
+        #capture all digits in int n in a list
+        for i in range(0, len(numStr)):
+                digits.append(int(numStr[i]))
+
+        # go through list and convert digits to words and build the string
+        teen = False #used for preventing
+        while (l > 0):
+            #10^8 to 10^6
+            if (l == 9):
+                if (digits[-(l - 1)] != 0 or digits[-(l - 2)] != 0):
+                    print l-1
+                    build.append(ones[digits[-l]]), build.append(others[0]), build.append("and")
+                else:
+                    build.append(ones[digits[-l]]), build.append(others[0]), build.append(others[2])
+            elif (l == 8 and digits[-8] == 1 and digits[-7] > 0): #10^4 is < 20,000,000 and > 10,000,000
+                tmp = digits[-7] + 10
+                build.append(teens[tmp]), build.append(others[2])
+                teen = True
+            elif (teen != True and (l == 8 or l == 7)): #10^4 is not < 20,000,000 and > 10,000,000
+                if (l == 8 and digits[-l] != 0):
+                    if (digits[-(l - 1)] != 0):
+                        build.append(tens[digits[-l]])
+                    else:
+                        build.append(tens[digits[-l]]), build.append(others[2])
+                elif (l == 7 and digits[-l] != 0):
+                        build.append(ones[digits[-l]]), build.append(others[2])
+            #10^5 to 10^3
+            elif (l == 6 and digits[-l] != 0):
+                if (digits[-(l - 1)] != 0 or digits[-(l - 2)] != 0):
+                    build.append(ones[digits[-l]]), build.append(others[0]), build.append("and")
+                else:
+                    build.append(ones[digits[-l]]), build.append(others[0]), build.append(others[1])
+
+            elif (l == 5 and digits[-5] == 1 and digits[-4] > 0): #10^4 is < 20,000 and > 10,000
+                tmp = digits[-4] + 10
+                build.append(teens[tmp]), build.append(others[1])
+                teen = True
+
+            elif (teen != True and (l == 5 or l == 4)): #10^4 is not < 20,000 and > 10,000
+                if (l == 5 and digits[-l] != 0):
+                    if (digits[-(l - 1)] != 0):
+                        build.append(tens[digits[-l]])
+                    else:
+                        build.append(tens[digits[-l]]), build.append(others[1])
+                elif (l == 4 and digits[-l] != 0):
+                        build.append(ones[digits[-l]]), build.append(others[1])
+
+            #10^2 to 10^0
+            elif (l == 3 and digits[-l] != 0):
+                if (digits[-(l - 1)] != 0 or digits[-(l - 2)] != 0):
+                    build.append(ones[digits[-l]]), build.append(others[0]), build.append("and")
+                else:
+                    build.append(ones[digits[-l]]), build.append(others[0])
+
+            elif (l == 2 and digits[-2] == 1 and digits[-1] > 0): #cases where 10^1 is < 20 and > 10
+                tmp = digits[-1] + 10
+                build.append(teens[tmp])
+                teen = True
+
+            elif (teen != True and (l == 2 or l == 1)): #10^1 is not < 20 and > 10
+                if (l == 2 and digits[-l] != 0):
+                    if (digits[-(l - 1)] != 0):
+                        build.append(tens[digits[-l]])
+                    else:
+                        build.append(tens[digits[-l]])
+                elif (l == 1 and digits[-l] != 0):
+                    build.append(ones[digits[-l]])
+            l -= 1
+        teen = False #reset teen bool in cases where n is of form #15,#15,#15 or similar
+        if (n < 0):
+            build.insert(0, 'negative')
+        word = ' '.join(build) #add spaces between words and save the completed string
+        return word
+
+n = input("Enter a whole number between 0 and 999,999,999: ")
+while (n > 999999999 or n < -999999999):
+    print "Error! You entered a value that was too large or too small."
+    n = int(raw_input("Please enter a whole number between 0 and 999,999,999: "))
+print intToWord(n)