reverse

Question

how do you reverse a string?

Answer 1

It depends what language you use; in python for example you can use string slicing:

str1 = "Hello World"
print(str1[::-1])
result: dlroW olleH

String slices are set using the syntax variableName[startPoint : endPoint : step]

str1[::-1] means that you don't set a start or end point so you include the whole string; by setting the step as -1 you move backwards through the word by one character at a time.

Answer 2

I've written up some examples here: https://code.sololearn.com/cikUaykgQjaA
It's really flexible because you don't have to include all 3!

The square brackets work the same as selecting an index, for example:

str = "Hello"
str[0] is H
str[1] is e...

...so by putting the start:end:step in the square brackets you're explaining that's how you want to move through the indices of the string.

Answer 3

So the variables dont need to be put in square brackets but the one that your indexing does. Thank you

Answer 4

so you can set a start and end point by putting them after the colon? Do the variables that you set have to be put in square parentheses? Or can they just be by themselves?