Python- The Loops

The while loop 

To test the while loop copy the code as below:

lv_counter = 0
while (lv_counter < 10):
print(“The counter value is: “,lv_counter)
lv_counter = lv_counter + 1

 

Make sure to ident the block as shown below

 

Once you run the program, you should get the output as shown below

The for loop

You can iterate over a range of number or strings or lists.

for number in range(1,10):
print (“Current number is : “,number)

for letter in ‘Tutorial’:
print(“Current letter is :”,letter)

places = [‘Dhaka’,’Islamabad’,’Thimpu’,’New Delhi’]
for place in places:
print(“You are in this city now :”,place)

In the same file created above, add the above lines as shown below”:

 

Once you’ve run the program, you should see the output as shown below:

 

 

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Python- The Decisions

  IF..ELSE

  1. We will start with the simple if..else statement in Python.
  2.  Create a new file ifelse.py and enter the below lines:num = 100
    if (num == 100) : print(“Value of the number is 100”)
    else :
    print (“Value of the number is not equal to 100”)print(“Exit”)                          
  3. Save the file and under Run menu, click on Run module. You should get the output as shown below:

 

All in One

  1. Next, we will see how to use the if, elif and else statements in one program.
  2. Type the code snippet as given below:

          

      3. Save the file and under Run menu, click on Run module. You should get the output as shown below:

          

Python- Using the IDLE to run your program

  1. Start up the IDLE. Then under File, select New Window or prss CTRL + N, which will open up an untitled window. This is where we will be writing our first program.python12
  2.  In the untitled window, write your first programpython13
  3. Give the file a name and save it (hello.py in this case)
  4. Next, under Run, select Run Module
  5. Now in the main window (IDLE SHELL), you will see the output as shown below:python15
  6. The SHELL is restarted every time one runs a module in IDLE. We can now proceed to writing full length programs!

Python- Setting the PATH

So, after installation of python, we need to update the environment variable PATH in windows 10.

  1. Click Windows + Pause, to start the System Properties and update the value for PATH as shown below:

    2. Start your command prompt and type : PATH. This should now include the installation directory of Python.

The Start

So I have decided to learn two new languages in 2017, beginning 11th April 2017 . For quite a while I wanted to learn Python and ADF and this blog marks the beginning of the journey.

The first post was to install Python and write the Hello World program. I will write new posts as I learn more about these two languages.

 

Python- The Firsts

  1. Installing Python :  Visit https://www.python.org/   and click on Downloads–>Windows. python1
  2. Download the executale. Here I have downloaded python-3.5.2  python2.PNGpython3.PNG
  3. Once the executable is downloaded (python-3.5.2-amd64.exe), double click on the file which will lauch the setup.

     

  4. Once this is done, navigate to C:\Users\<yourusername>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Python 3.5, you should see the following :python6
  5.  Click on the IDLE (Python 3.5.64-bit) and the python shell is launched. python7.PNG
  6. And thats it! Takes less than 5 minutes to install python.
  7. Okey, Finish it up with the customary Hello World program. (The error to show that the parentheses are required from python 3 and above. Print has moved from being just a “statement” to being a “function”!)python8