XI_Loops

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01)     Introduction
          Need for loop
          Definition of loop
          Types of loops 
          for loops explained
          range() explained
          Membership operator in
          ending character explained
          range, 1st argument default value
          range, 3rd argument explained
          to find the sum: 3 changes explained
          to find a product: 3 changes explained.

02)     Application of 'for loop' - 1
          Even and odd numbers
             using 3rd argument of range()
          Sum/Product of odd/even nos.
          Short-cuts explained:  a += b

03)     Application of 'for loop' - 2
          Multiples of 'm'
          Concept of Lower bound 'a'
             and upper bound 'b'
         To display/sum/product of
             multiples of 'm' explained.

04)     Application of 'for loop' - 3
          Perfect Squares
         To display/sum/product of
             perfect squares explained.

05)     Menu Driven: Perfect Square
          Menu driven program on
          Perfect Square explained.