While/For Loop & Single/Multi-line comments in python.

In this post, we will look how to code using for/while loop in python alongwith how to mention comments in the python file.

I. Comments in Python

a. Multiple Line Comments
To mention multiple line comments, we need to use multiple single quotes.

''''
Multiple line comments
in Python can be placed like this also.
'''

b. Single Line Comments

In python we used to mention single line comments by beginning the line with "#".


II. While and FOR Loop
While and for loops are used to run a specific statement multiple times until the condition is true.
for loop provides more options and is considered more feasible in usage.

# while loop to print i till the condition is true.
i=1
while i <=5:
    print(i)
    i=i+1  # or i+=1

print("Loop completed")

# Loop across a string characters
for letter in "ngelinux":
    print(letter)

# Loop in a range
for i in range(5,15):
    print(i)

# Loop through an array
items=["pencil","rubber","pen"]
for i in range(len(items)):
    print(items[i])

 

Output

/Users/saket/PycharmProjects/1helloworld/venv/bin/python /Users/saket/PycharmProjects/1helloworld/looping.py
1
2
3
4
5
Loop completed
n
g
e
l
i
n
u
x
5
6
7
8
9
10
11
12
13
14
pencil
rubber
pen
Process finished with exit code 0

 

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