human
XOR of all even numbers from a given range | Function to calculate XOR of numbers in the range [ 1 , n ].
If n is divisible by 4.
If n mod 4 is equal to 1.
If n mod 4 is equal to 2.
Function to find XOR of even numbers in the range [ l , r ].
Update xor_r.
Update xor_l.
Driver Code"
Solution in Python:
 Give me a code to xOR of all even numbers from a given range and the other steps required?
assistant
#Here is code to xOR of all even numbers from a given range and the other steps required.
 def bitwiseXorRange ( n ) :
	if ( n % 4 == 0 ) :
		return n
	if ( n % 4 == 1 ) :
		return 1
	if ( n % 4 == 2 ) :
		return n + 1
	return 0
def evenXorRange ( l , r ) :
	xor_r = 2 * bitwiseXorRange ( r // 2 )
	xor_l = 2 * bitwiseXorRange ( ( l - 1 ) // 2 )
	return xor_l ^ xor_r
if __name__ == ' _ _ main _ _ ' :
	l = 10
	r = 20
	print ( evenXorRange ( l , r ) )