Question

How to calculate logarithm for float numbers in Python

Answer 1

import math 
  
for i in [0.1, 1.3, 2.6, 3.14, 4, 0]:         
   try:    
     print('{:2.1f} {:.18f}'.format(i, math.lgamma(i)))            
   except ValueError as err:                
     print('Error calculate lgamma({}): {}'.format(i, err))



'''
run:

0.1 2.252712651734205540
1.3 -0.108174809507860292
2.6 0.357411863548979358
3.1 0.826138704777028998
4.0 1.791759469228055401
Error calculate lgamma(0): math domain error

'''

 

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Answer 2

import math 
  
for i in [0.1, 1.3, 2.6, 3.14, 4, 0]:         
   try:    
     print('{:2.1f} {:.18f}'.format(i, math.log(math.gamma(i))))            
   except ValueError as err:                
     print('Error calculate lgamma({}): {}'.format(i, err))



'''
run:

0.1 2.252712651734205984
1.3 -0.108174809507860237
2.6 0.357411863548979802
3.1 0.826138704777028332
4.0 1.791759469228054957
Error calculate lgamma(0): math domain error

'''

 

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