Question

How to count the total set bits in all numbers from 1 to N in Python

Answer 1

def count_set_bits(n): 
    count = 0
    while (n): 
        count += n & 1
        n >>= 1
    return count 
   
  
def count_total_set_bits(n): 
    setBitCount = 0; 
   
    for i in range(1, n + 1):
        setBitCount += count_set_bits(i)
   
    return setBitCount


   
n = 6

'''
0001
0010
0011
0100
0101
0110
'''
     
print(count_total_set_bits(n))



'''
run:
 
9
 
'''

 

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