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Learn Python by examples – Ex-01-05

Learn Python by examples – Ex-01-05

 
Note there are multiple ways to solve a problem.
Here is one solution.
 

Exercise 1: Write a program to print Hello World!
 

Solution:
 

Concept:
How to use basic print built in function.
 


print("Hello World!")

Output:

Hello World!

 
 

Exercise 2: Write a program to greet John, say Hello! John
 
Concept:
How to use basic print built in function.
 
Solution:
 


print("Hello! John")

Output:

Hello! John

 
 
Exercise 3: Write a program to greet the user Ex: Hello! [user_name]
 
Solution:

 
Concept:
Take user input by using input() built-in function, use variable and print it.
 


user_name = input("Enter your name :>")
print("Hello ! ", user_name)

Output:

Enter your name :>John
Hello !  John

 
 

Exercise 4: Write a program to add two numbers and print the result Ex: 20 + 30 => 50
 
Solution:

 
Concept:
print() with two arguments, string and an arithmetic expression
 


print("Sum of 20 and 30 is :", 20 + 30)

Output:

Sum of 20 and 30 is : 50

 
 

Exercise 5: Write a program to add two numbers and print the result Ex: 20 + 30 => 50
 
Solution:

 
Concept:
Handling user inputs, arithmetic operation,
use of int() type constructor, string format() usage.
 

a = int(input("Enter first number :>"))
b = int(input("Enter second number :>"))

#explicit use of int() type constructor
#a = int(a)
#b = int(b)

print("sum of {} and {} is {}".format(a,b,a+b))

Output:

Enter first number :>10
Enter second number :>50
sum of 10 and 50 is 60