Definition of String
You can use either single quotes or double-quotes to define strings in Python.
Cars = "Tesla cars"
print(Cars)Tesla cars
However, when there are single quotes inside, you should only use double quotes or vice versa.
Test_1="Tesla's cars are great."
print(Test_1)
Test_2='He said "He loves Tesla cars."'
print(Test_2)Tesla's cars are great. He said "He loves Tesla cars."
Index and Slice Strings
You can index part of a string by using blockquotes, starting with 0. The following will print the letter “T.”
Cars = "Tesla cars"
print(Cars[0])T
You can access part of the string by using colons. If without starting or ending with a number, Python assumes the first character or last character of the string. The substring includes the character at the start, but excludes the character at the end.
Cars = "Tesla cars"
print(Cars[0:3])
print(Cars[:5])Tes Tesla
When using a negative index number, Python returns the character starting from the end.
Cars = "Tesla cars"
print(Cars[-1]) s
Concatenate Strings
The following code shows how you can combine two strings together, and then print it out in Python.
part_1 = 'Good '
part_2 = 'Day'
parts_combined = part_1 + part_2 + '!'
print(parts_combined)Good Day!
Use Variables in Python Strings
The following code shows how you can add a variable into a string and print it out in Python. Place the letter f before the quotation mark and put the brace around the variable name.
name = 'Bill'
message = f'Hello {name}'
print(message)Hello Bill