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Make e04_ord_chr more readable & efficient #28

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Make e04_ord_chr more readable & efficient #28

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12 changes: 8 additions & 4 deletions ch01-numbers/e04b1_ord_chr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,11 +9,15 @@ def ord_hex_output():

decnum = 0
hexnum = input('Enter a hex number to convert: ')
ord_0 = ord('0')
ord_a_minus_10 = ord('a') - 10
for power, digit in enumerate(reversed(hexnum)):
if 48 <= ord(digit) <= 57:
dec_digit = ord(digit) - 48
elif 97 <= ord(digit) <= 102:
dec_digit = ord(digit) - 87
if '0' <= digit <= '9':
dec_digit = ord(digit) - ord_0
elif 'a' <= digit.lower() <= 'z':
dec_digit = ord(digit.lower()) - ord_a_minus_10

decnum += dec_digit * (16 ** power)
print(decnum)

ord_hex_output()