66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
# integer number to english word conversion
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# can be used for numbers as large as 999 vigintillion
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# (vigintillion --> 10 to the power 60)
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# tested with Python24 vegaseat 07dec2006
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def int2word(n):
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"""
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convert an integer number n into a string of english words
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"""
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# break the number into groups of 3 digits using slicing
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# each group representing hundred, thousand, million, billion, ...
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n3 = []
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r1 = ""
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# create numeric string
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ns = str(n)
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for k in range(3, 33, 3):
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r = ns[-k:]
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q = len(ns) - k
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# break if end of ns has been reached
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if q < -2:
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break
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else:
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if q >= 0:
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n3.append(int(r[:3]))
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elif q >= -1:
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n3.append(int(r[:2]))
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elif q >= -2:
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n3.append(int(r[:1]))
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r1 = r
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#print n3 # test
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# break each group of 3 digits into
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# ones, tens/twenties, hundreds
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# and form a string
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nw = ""
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for i, x in enumerate(n3):
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b1 = x % 10
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b2 = (x % 100)//10
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b3 = (x % 1000)//100
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#print b1, b2, b3 # test
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if x == 0:
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continue # skip
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else:
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t = thousands[i]
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if b2 == 0:
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nw = ones[b1] + t + nw
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elif b2 == 1:
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nw = tens[b1] + t + nw
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elif b2 > 1:
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nw = twenties[b2] + ones[b1] + t + nw
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if b3 > 0:
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nw = ones[b3] + "hundred " + nw
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return nw
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############# globals ################
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ones = ["", "one ","two ","three ","four ", "five ",
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"six ","seven ","eight ","nine "]
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tens = ["ten ","eleven ","twelve ","thirteen ", "fourteen ",
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"fifteen ","sixteen ","seventeen ","eighteen ","nineteen "]
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twenties = ["","","twenty ","thirty ","forty ",
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"fifty ","sixty ","seventy ","eighty ","ninety "]
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thousands = ["","thousand ","million ", "billion ", "trillion ",
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"quadrillion ", "quintillion ", "sextillion ", "septillion ","octillion ",
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"nonillion ", "decillion ", "undecillion ", "duodecillion ", "tredecillion ",
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"quattuordecillion ", "sexdecillion ", "septendecillion ", "octodecillion ",
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"novemdecillion ", "vigintillion "]
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