If the number entered is less than or equal to zero, or is not an integer

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Background Info

Consider the following calulation for some value of n:

YOUR TASK

1 + 1+2 + 1+2+3 + 1+2+3+4 + ...

+

1+2+3+4+...+n

TL

Allow the person using your program to enter any number, n.

If the number entered is less than or equal to zero, or is not an integer (like 4.63 or 11.2):

"Invalid input given."

...and your program should quit.

If the number provided, n, is a positive integer it should compute the sum suggested by the calculation you were asked to consider above. Your output should be consistent with the output suggested by the example below:

For example, if n = 5, the calculation you program must perform is:

1+1+2+1+2+3+

2+3+4 + 1+2+3+4+5

5

 

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