Add DNA_Matching problem to (L-I).

Author: tsongtheng

L-I/0011 DNA_Matching/DNA_Matching.js

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+function dnaMatch(dna1, dna2) {
+  // Check if the lengths of the two DNA sequences are different
+  if (dna1.length !== dna2.length) {
+    return false; // Different lengths, not a match
+  }
+
+  // Iterate through each character of the DNA sequences
+  for (let i = 0; i < dna1.length; i++) {
+    // Compare characters at the current position
+    if (dna1[i] !== dna2[i]) {
+      return false; // Characters don't match, not a match
+    }
+  }
+
+  // If we reach this point, all characters match, so it's a match
+  return true;
+}
+
+// Test cases
+console.log(dnaMatch("ACGT", "ACGT")); // true
+console.log(dnaMatch("ACGT", "ACTG")); // false
+console.log(dnaMatch("AACT", "AACC")); // false

L-I/0011 DNA_Matching/README.md

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+# 0011 DNA_Matching ( L-I )
+
+## Problem
+
+You are given two DNA sequences as strings, representing the genetic code of two individuals. Each DNA sequence consists of a series of characters, where each character can be one of four options: 'A' (adenine), 'C' (cytosine), 'G' (guanine), or 'T' (thymine).
+
+Write a JavaScript function called dnaMatch that takes these two DNA sequences as input and returns true if they are a match and false otherwise. Two DNA sequences are considered a match if they have the same characters in the same order.
+
+**Example**
+
+```
+If the input DNA sequences are "ACGT" and "ACGT", the function should return   true   because they are an exact match.
+If the input DNA sequences are "ACGT" and "ACTG", the function should return   false   because the order of characters is different.
+If the input DNA sequences are "AACT" and "AACC", the function should return   true   because some characters do not match.
+```
+
+**Here's an example of how the function should work:**
+
+```javascript
+console.log(dnaMatch("ACGT", "ACGT")); // true
+console.log(dnaMatch("ACGT", "ACTG")); // false
+console.log(dnaMatch("AACT", "AACC")); // false
+```
+
+## Solutions
+
+```javascript
+function dnaMatch(dna1, dna2) {
+  // Check if the lengths of the two DNA sequences are different
+  if (dna1.length !== dna2.length) {
+    return false; // Different lengths, not a match
+  }
+
+  // Iterate through each character of the DNA sequences
+  for (let i = 0; i < dna1.length; i++) {
+    // Compare characters at the current position
+    if (dna1[i] !== dna2[i]) {
+      return false; // Characters don't match, not a match
+    }
+  }
+
+  // If we reach this point, all characters match, so it's a match
+  return true;
+}
+
+// Test cases
+console.log(dnaMatch("ACGT", "ACGT")); // true
+console.log(dnaMatch("ACGT", "ACTG")); // false
+console.log(dnaMatch("AACT", "AACC")); // false
+```
+
+## How it works
+
+1. The `dnaMatch` function takes two input arguments: `dna1` and `dna2`, which are the two DNA sequences we want to compare.
+
+2. First, it checks if the lengths of `dna1` and `dna2` are different using the `if (dna1.length !== dna2.length)` conditional statement. If they have different lengths, the function immediately returns `false` because sequences of different lengths cannot be a match.
+
+3. If the lengths are the same, the function proceeds to compare the characters of the two DNA sequences.
+
+4. It enters a `for` loop that iterates through the characters of the sequences. The loop is controlled by the variable `i`, which starts at 0 and goes up to `dna1.length - 1`. This loop allows us to compare characters at the same position in both sequences.
+
+5. Inside the loop, the code compares the characters at the current position `i` using the conditional statement `if (dna1[i] !== dna2[i])`. If the characters at position `i` are not the same in both sequences, the function immediately returns `false` because it found a mismatch.
+
+6. If the loop completes without finding any mismatches, meaning it has compared all characters in both sequences, the function returns `true`. This indicates that the two DNA sequences are identical and, therefore, a match.
+
+## References
+
+- [ChatGPT](https://chat.openai.com/)
+
+## Problem Added By
+
+- [Tipchan](https://github.com/tsongtheng)
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
+
+Please make sure to update tests as appropriate.