Question

write an algoruthm and draw a flowchart to calculate the sum of natural numbers lies between 1 and 20​

Answer 1

We can start off by initializing 2 integer variables, ‘a’ and ‘sum’.

Let a = 1

Let sum = 0

Now, start a ‘for’ loop, as we know the number of times this algorithm should repeat itself.

for(i = 1; i <= 20; i++):

sum += i;

There’s another method to do this, but here, we will need to initialize our variables are doubles instead of integers.

Let i = 20

Let sum = 0

sum += i⋅ (i+1)2 ;

return sum;

This might seem extra, but we can try to emulate Carl Gauss to fund the solution to this problem.

Let i = 20 (terminal value)

Let s = 1 (starting value)