How to calculate 1 too 100 addition ?

Question

I can't calculat this !

Answer 1

Something like this would work:
total = 0
for i in range(1, 100):
total += i
print(total)

That would be i from 1 to 99 including 1 and including 99.

range(1, 101) would be needed if you want 100 included in that loop.

If this wasn't just a lesson with Python and you want a more efficient solution, consider how that total is related to area of a right-angle triangle. sum of 1 to 100(excluding 100, including 1) is equal to 100 * (100 - 1) / 2. In other words, the same number can be calculated without a loop even when the limit of 100 is an unknown like x * (x - 1) / 2.

Answer 2

By Using SUM of AP(arithmetic mean)
S = n/2[2a + (n − 1) × d]
where
n= 100
a = 1
d= 1
S = 100/2[2(1)+ (100 − 1) × 1]= 50(101)=5050

Answer 3

Thanks sar