# Practice Questions for the variables & data types

Source code here is from the activity questions of variables and data types.ppt

1. Write a separate program to accomplish each of these exercises. Save each program with a filename that follows standard Python conventions, using lowercase letters and underscores, such as simple_message.py and  simple_messages.py.

i. Simple Message: Store a message in a variable, and then print that message.

ii. Simple Messages: Store a message in a variable, and print that message. Then change the value of your variable to a new message, and print the new message.

Code:

```message = "Start learning python Programming!"
print(message)
message = "Learn from bhutanpythoncoders.com"
print(message)
```

Output:

```Start learning python Programming!
Learn from bhutanpythoncoders.com
```

2. Karma borrowed  Nu  50000  to start a  business from the  Bank of Bhutan for 3 years at the rate of 12%. Write a program to calculate the simple interest and amount to be paid after 3 years. Use variables in the program.

Code:

```principal_amount = 50000
time = 3
rate = 12/100
simple_interest = principal_amount * time * rate
print(simple_interest)
total_loan_repayment = principal_amount + simple_interest
print(total_loan_repayment)
```

Output:

```18000.0
68000.0
```

3. Write a python program to find the circumference of a circle with a diameter of 10cm.

Code:

```PI = 3.14
radius = 10/2   # 10cm is a diameter
circumference_of_circle = 2 * PI * radius
print(circumference_of_circle)
```

Output:

```31.400000000000002
```