Python Strings Methods, Concatenation, & Repetition

you don't have to use repetition with just single character strings, for ex:

happiness = 'happy ' * 3 print(happiness) Output: happy happy happy

this method of a string object returns a copy of the string in all lower case letters:

lower() method

Objects also have functions, but they are not called functions. They are called this:

methods

string repetition example:

print ('-' * 10) Output: ----------

string concatenation example w/ spaces:

print('I ' + 'love ' + 'Python.') print('I' + ' love' + ' Python.') Output: I love Python. I love Python.

string concatenation example w/o spaces:

print('I' + 'love' + 'Python.') Output: IlovePython.

'apple' is an object with a type of "str," which is short for this.

short for string.

When working with strings, this symbol is the repetition operator for repeating strings.

the asterisk symbol (*)

the string repetition format is:

the format is: 'string' * number_of_times_to_repeat

To concatenate, or combine, two strings use this math sign:

the plus sign (+)

this string method returns a copy of the string in all upper case letters:

the upper() string method

if we assign the value of apple to the variable fruit using fruit = 'apple', then fruit is also this.

then fruit is also a string object

to concatenate:

to combine

t/f: everything in Python is an object, and every object has a type.

true

variables are names that represent this:

values

Methods are functions that are run against this.

(that are run against) an object

OOP stands for this:

Object Oriented Programming, (OOP)

this is a section of reusable code that performs an action:

a function

t/f: to call a method on an object, follow the object with a period, then the method name, and finally a set of parenthesis . Enclose any parameters in the parenthesis.

ex: (the lower string method) fruit= 'Apple' print(fruit.lower()) Output: apple

t/f: one can NOT concatenate multiple strings by using additional plus signs and strings.

false: one CAN concatenate multiple strings by using additional plus signs and strings.

The following example demonstrates string concatenation using variables.

first = 'I' second = 'love' third = 'Python' sentence = first + ' ' + second + ' ' + third + '.' print(sentence) Output: I love Python.

lower() method example:

fruit = 'Apple' print(fruit.lower()) Output: apple

an upper() string method example:

fruit = 'Apple' print(fruit.upper()) Output: APPLE