"In computer science, you could prove it formally with a loop invariant, where you state that a desired property is maintained in your loop. Such a proof is broken down into the following parts:\n", " ...

The included code stub will read an integer,1<=n<=150, from STDIN. Without using any string methods, try to print the following: 123...n Note that "..." represents the consecutive values in between.

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class Rectangle: def __init__(self,breadth,length): self.breadth=breadth self.length=length def area(self): return self.breadth*self.length pass class Circle: def ...