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docs(palindrome): add wikipedia documentation link

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docs/en/Strings/Palindrome.md
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A palindrome is a word, phrase, number or sequence of words that reads the same backward as forward. Punctuation and spaces between the words or lettering is allowed. A palindrome is a word, phrase, number or sequence of words that reads the same backward as forward. Punctuation and spaces between the words or lettering is allowed.
## Steps ## Steps
### Step 1 1. Clean the string by removing all punctuation and whitespace and converting all letters to lowercase.
Reverse string. 2. Reverse the clean string.
### Step 2 3. If the clean string is the same as the reversed string then we have a palindrome.
Compare the reversed string to the original string, if they are equal this mean that string is palindrome.
## Example ## Example
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- Civic - Civic
- Level - Level
- Madam - Madam
- Radar
### Multiple Word Palindromes ### Multiple Word Palindromes
- Don't nod. - Don't nod.
- I did, did I? - I did, did I?
- My gym - My gym
- A man, a plan, a canal - Panama
## Implementation ## Implementation
- [C](../../../algorithms/C/strings/palindrome.c) - [C](../../../algorithms/C/strings/palindrome.c)
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- [Rust](../../../algorithms/Rust/strings/palindrome/src/main.rs) - [Rust](../../../algorithms/Rust/strings/palindrome/src/main.rs)
## Video URL ## Video URL
[A coursera video explaining the palindrome Algorithm](https://www.coursera.org/lecture/program-code/palindrome-algorithm-1-zzQqs) * [A coursera video explaining the palindrome Algorithm](https://www.coursera.org/lecture/program-code/palindrome-algorithm-1-zzQqs)
## Others ## Others
[Wikipedia](https://en.wikipedia.org/wiki/Palindrome)
Any other information is always welcome and should be included in this section. Any other information is always welcome and should be included in this section.