1.Write a program that asks the user to type in a string, and then tells the user how long that string was.
We will save the string in question as "string1". Thestr() command converts the user input into a string. Then we have the program print the length. Note that the print statement doesn't require extra spaces - these are added automatically.
string1=str(raw_input("Type in a string: "))print("The string is",len(string1),"characters long.")
2.Ask the user for a string, and then for a number. Print out that string, that many times. (For example, if the string ishello and the number is3 you should print outhellohellohello.)
Ask the user for some text and use thestr() command to turn it into a string (we will save it as "text"). Then ask the user for a number and use theint() command to turn it into an integer. We'll save this as "number".
Lastly print"text" times"number".
text=str(raw_input("Type in some text: "))number=int(raw_input("How many times should it be printed? "))print(text*number)
3.What would happen if a mischievous user typed in a word when you ask for a number? Try it.
Let's try it! You can use a simple program such as this one:
number=int(raw_input("Type in a number: "))doubled=number*2print(doubled)
When we run it with text we get an error:
Type in a number: I am not a number! Traceback (most recent call last): File "C:/Documents and Settings/D Irwin/Desktop/test2.py", line 1, in <module> number = int(raw_input("Type in a number: "))ValueError: invalid literal for int() with base 10: 'I am not a number! 'The program calmly reminds us that'I am not a number! ' is not a number!