Let’s take the following sentence:
words = "These are some words"
We can use slices to reverse the order of the string:
print( words[::-1] )
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Let’s say we wanted to reverse each word in the sentence, but keep the order of words.
We can once again use slices, but we will compliment it with a list comprehension:
print( " ".join([word[::-1] for word in words.split(" ")]) )
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How to Reverse words without using inbuilt modules
Let’s take this a bit further. Let’s say that we were not allowed to use our cool new slice toy, how could we reverse a string?
words = "These are some words"
out = ""
for i in range(len(words)-1, -1, -1):
out += words[i]
print(out)
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As we can see, this is the same as doing words[::-1], which shows the power and simplicity of slices!
We created a variable to hold our new string, then created a loop, counting from the last item in the index, to 0. We also made sure to do this in reverse.
In each iteration, we appended to our output string.