Input, Process & Output

Assignment

variable = expression
The = operator assign the expression on the right side to the variable in left side.

Interaction with user

To read/get a value from the user:
• use the command: input
• Read from the keyboard

To display a value to the user:
• Use the command: print
• On-screen display

Display statement

print(expression[,expression2, expression3,…])
The print() function prints the given expression on the console screen

Read user input

variable = input(string)

• Any entry is considered as a string
• Must Convert the entry to the desired data type

Example: ask the user for his name and his age

	    name = input("Enter your name:")
        age = input("Enter your age:")
        age = int(age)
	

Input convertion

x = input("Enter anything:")

• The data type of x is string
• To convert the x into int: x = int(x)
• To Convert the x into float: x = float(x)

Example: Program to read name and age from user and display it

	    name = input("Enter a name")
        age = input("Enter an age ")
	

	    print("Hello ",name," my age is also ",age)
	

Here is the output:

Example-2: with simple calculation

	    name = input("Enter a name”)
        age = input("Enter an age ”)
        age = int(age)
        ageNextYear = age + 1
        print("Hello ",name," you will be ", ageNextYear, "next year" )
	

Example-3: with simple calculation

	    price = input("Enter the price of item ")
        price = float(price)
        qty = input("Enter the quantity ")
        qty = int(qty
        total = price * qty
        print("Total price ",total," dhs")