Coding with Strings
Strings are ordered sequences, so we can index and slice the string.
We can use a square bracket notation to extract characters from the string, in the format [start:stop:step].
Consider the string “Greetings!” indexed from the start.
0
1
2
3
4
5
6
7
8
9
G
r
e
e
t
i
n
g
s
!
We can use forward or reverse indexing. Consider the string “Greetings!” indexed and sliced from the end.
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
G
r
e
e
t
i
n
g
s
!
I can also grab a single character.
As discussed previously, strings are immutable, that means you cannot change the string. You can however slice the string and reassemble a new string with changes.
You cannot add a string and a number, they are different types. Examine the code below.
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