Page 443 - AI Ver 3.0 class 10_Flipbook
P. 443
[2]: for A in range(1,11,2):
print(A,end=",")
1,3,5,7,9,
[3]: for Var in range(100,10,-10):
print(Var,end=",")
100,90,80,70,60,50,40,30,20,
[4]: for Var in range(5, 10, 2):
print(Var,end=",")
5,7,9,
Brainy Fact
Comparison operators (<, >, <=, >=, =, ==) and Boolean Operators (and, or) returns True or False.
The While Loop
The while loop is used to repeat a set of instructions as long as the condition is True. It means when the
number of iterations is not fixed/indefinite before we start with the execution of a loop. It is therefore known as
indefinite loop. Indentation of statements is must to specify the block of statements to be repeated using while
loop. This loop is also called an entry-controlled loop as it checks for the condition in the beginning only. If the
condition is True then the body of the loop will be executed. If the condition is False then it will not be allowed
to enter within the loop and it stops.
Syntax for the while loop:
while <condition>:
Statements
increment or decrement counter variable
Where,
• while is a reserved keyword.
• condition is the criterion to repeat the instructions. The instructions repeat till the condition is True.
As soon as the condition is False it exits from the loop.
• Statements are always indented can be single or a block. They are repeated till the condition is True.
Increment / decrement counter variable to change its value.
Some examples of while loop are given below.
[1]: count = 1
while count <= 5:
print("Hello")
count+=1
print("Program ends")
Hello
Hello
Hello
Hello
Hello
Program ends
Advance Python (Practical) 441

