In Python, loops are used to execute a block of code repeatedly based on a condition. Python supports two main types of loops: for loops and while loops.

Types of looping statements:

1. for

2. while

3. while with else

4. nested loops


The syntax for the looping statements are as follows:

1. for loop

    for var_name in range ( start : end : increment ) :


    Example- 

a.  for i in range ( 6 ) :     

        print ( i )

    Output :

    0

    1

    2

    3

    4

    5


b.  str = " xyz "

     for i in str :

          print ( i ) 

      Output-

       x

       y

       z

 

2. while loop

a.  while ( a <= 5 ) :

        print ( a )

        a = a + 1

    Output:

    0

    1

    2

    3

    4

    5


b.  a=1

    while ( a <=5 ) :

        print ( a )

        a = a + 1

    else :

        print ( " End " )

    Output:

    0

    1

    2

    3

    4

    5

    End



Consider the following code for inputting and squaring the elements of the list

l = []

for i in range ( 10000000 ) :

    s = int ( input ( " Enter values for list - " ) )

    l.append(s)

    if ( s==0 ) :

        break

    else:

        continue


for j in range( len(l) ) :

    l[j] = l[j] * l[j]

    print ( l[j] )


Output: