Loop Concept in Python

It is used to print large statement of data using common repeatable block.loop is mostly used to perform an operation on range-based data.

It is also called Control Structure or Iterative Statement in Python application.

Type of Loop:-

1 while:-
 
  init;
  while condition:
      statement
      increment


it is used to solve a problem where the condition is not pre-determine means an infinite condition.

2 for:-

it is used to display range based data using range()  , range() will contain three parameters.

range(start,end,increment)
range(start,end)

start means initial

end means last

increment means to increase or decrease the value by one,two,three

by default increment by one

Syntax of for loop

for i in range(start,end):
   statement

here i is the variable

for i in range(end,start,-1):
   statememt

for i in range(1,10,2):
   statement

Assignment of Loop:-

WAP to print factorial of Loop with complete expression?

5
5*4*3*2*1=120


WAP to print before five-digit and after five-digit of any entered number using single while loop?

5
1      6
2      7
3      8
4      9
5      10

WAP to check prime number with complete expression?

WAP to reverse any digit number and find the maximum number?


Nested For loop:-


it is used to manipulate multidimensional List, Array, and Set . We can create more than one for loop using a nested sequence.

It contains one outer loop and multiple inner loops, the outer loop will execute once until the inner loop will false. when inner false than the outer loop will increase when outer false then loop will be terminated.


for i in range(start,end):
  for j in range(start,end):
     print(i)

1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
.............................................................
i          j
1         5
2         4
3         3
4         2
5         1
........................................................................................

A a B b C
A a B b
A a B
A a
A
............................................................

1 0 0 1 1
1 0 0 1
1 0 0
1 0
1
................................................................

          *
    *    *     *
*   *    *     *   *
..........................................................

Sum of prime elements from given range?


2
3  5
7   11  13
17  19  23  29
.................................................................................

1
2 3
4 5 6
7 8 9 10
.............................................


A B C D E
    B C D E
        C D E
            D E
                E