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Sum of all natural numbers in range L to R | Function to return the sum of all natural numbers.
Function to return the sum of all numbers in range L and R.
Driver Code"
Solution in Python:
assistant
#Here is code to sum of all natural numbers in range L to R and the other steps required.
 def sumNatural ( n ) :
	sum = ( n * ( n + 1 ) ) // 2
	return sum
def suminRange ( l , r ) :
	return sumNatural ( r ) - sumNatural ( l - 1 )
l = 2 ; r = 5
print ( " Sum ▁ of ▁ Natural ▁ numbers ▁ from ▁ L ▁ to ▁ R ▁ is ▁ " , suminRange ( l , r ) )