Chapter 4

Question 1

What is an integer ( data type )?

Answer 1

Whole numbers both positive and negative

Question 2

What is a float ( real number ) ?

Answer 2

Real numbers, decimals and intergers. All Integers can be floats but not the other way.

Question 3

What is a string ( data type )?

Answer 3

Multiple characters ( a list of characters )

Question 4

What is the difference between a strongly-typed and a weakly-typed language? And provide examples.

Answer 4

In a strongly typed language (C, C++) you have to explicitly specify the data type in a variable.

In a weakly typed language (python), the programming language “guesses” the data type.

Question 5

len(string)

Answer 5

len(“orange”) => 6

Question 6

string.capitalize()

Answer 6

“orange”.capitalize() => Orange

Question 7

string.lower()

Answer 7

“BAnAna”.lower() => banana

Question 8

string.upper()

Answer 8

“BAnANa”.upper() => BANANA

Question 9

string.rjust(number)

Answer 9

“Dog”.rjust(50) => (50 length)Dog

Question 10

string.replace(oldvalue, newvalue)

Answer 10

“Dog”.replace(“o”, “i”) => Dig

Question 11

string.split(separator)

Answer 11

“myname”.split(“y”) => [“my”, “name]

Question 12

string.strip(characters)

Answer 12

“…##..banana..#..”.strip(.#) => banana

Question 13

string.join(list)

Answer 13

“+”.join([“Bill”,”Barney”,”Ben”]) => Bill + Barney + Ben

Question 14

string.find(substring)

Answer 14

“The missing word”.find(miss) => 4

Question 15

string.format (items)

Answer 15

“My name is {name} and I am {age} years old”.format(name=“Bob”,age= “27”) => My name is Bob and I am 27 years old.

Question 16

\n

Answer 16

Newline

Question 17

\t

Answer 17

Tab

Question 18

\”

Answer 18

Prints the literal “

Question 19

\

Answer 19

Prints the literal \

Question 20

What is combining strings called?

Answer 20

Concatenation

Question 21

What is looping through a string called?

Answer 21

String traversal

Question 22

What does concatenation do?

Answer 22

Combines strings and lists. Does not combine integers or floats.