A difficult homework with Python and I'm new -

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The statement says:

While writing the use of instructions, a function, mentre (function name ), To calculate the following values:

  1. The sum of the first n numbers is integers: 1 + 2 + 3 + ... + n

  2. The sum of the first n odd numbers: 1 + 3 + 5 + .. + (2nâ ???? 1)

  3. The sum of all the numbers that the user enters until it is 999 (the amount is not included in 999).

  4. Before reaching a number 2 (with integer division) 1 can be.

    I try with that time, but always responds to the error :(. Thank you very much for taking the time to respond and solve your problem. 

      x = input ("number:") x = int (x) y = 0 z = 0 while y & lt; x + 1: z = z + yy + = 1 print (z)   
     This is your first one. You can create from here.    L

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