Strings and Console Output

Question 1

String

Answer 1

A data type; can contain letters, numbers, and symbols.

eg. Name = Ryan (Ryan is the string value)
age = 19
food - cheese

Question 2

Escaping Characters

Answer 2

Characters that cause trouble in code because Python thinks they’re ending the code (the apostrophe is one) - fix this by putting a backslash before them eg. ‘There's)

Question 3

Index

Answer 3

A number assigned to a character in a string. Always starts counting from “0”

Question 4

String methods

Answer 4

Let you perform certain tasks for strings

Eg. len(), lower(), upper(), str()

Question 5

len()

Answer 5

string method that gets the length (number of characters) of a string - the variable goes into the ()

Question 6

lower()

Answer 6

String method that removes capitalization in a string - call like variable.lower()

Question 7

upper()

Answer 7

String method that adds capitalization in a string - call like variable.upper()

Question 8

str()

Answer 8

A string method that turns non-strings into strings eg. str(2)

Question 9

Dot Notation

Answer 9

Eg. variable.upper()

The dot that separates them is dot notation and used for upper() and lower() string methods. Methods using dot notation only work with strings.

Question 10

Print

Answer 10

Used to print strings and variables to the console

Question 11

String Concatenation

Answer 11

Combining strings together using arithmetic operators

Question 12

Explicit String Conversion

Answer 12

Used to combine a string with a non-string - need to convert non-string to a string - uses str()

Question 13

String formatting with %

Answer 13

”%” operator after a string can combine a string with variables

Replaces %s with the string variable that comes after it

Eg. print “Hello %s” % (name)

Question 14

What is happening here?

name = raw_input("What is your name?")
quest = raw_input("What is your quest?")
color = raw_input("What is your favorite color?")

print “Ah, so your name is %s, your quest is %s, “ \
“and your favorite color is %s.” % (name, quest, color)

Answer 14

String formatting is being used to insert the variables name, quest, and colour into the print command using the %s and % operators. The program will accept the raw input to each question and put it into the print command.

Question 15

datetime.now()

Answer 15

Retrieves the current date and time

Question 16

from datetime import datetime

Answer 16

imports the datetime library for use in code

Question 17

What is happening here?

from datetime import datetime
now = datetime.now()

print ‘%s/%s/%s’ % (now.month, now.day, now.year)

Answer 17

The date time library is being imported
the variable “now” is being set to daytime.now, and one will print using string substitution to list the date by month/day/year