Update bufferHash.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/bufferHash.md

@@ -6,6 +6,19 @@ Computes a k-bit non-cryptographic hash of the buffer using the FNV-1 algorithm.
 FNV-1 is a fast, non-cryptographic hash algorithm (suitable for checksums, not security)
 
 ## Parameters
- `bits`: specifies the output width (1-32 bits), determining 
+ * **bits**: specifies the output width (1-32 bits), determining 
 the result range: 0 to 2^bits-1. For example, bits=5 produces values 0-31. Use this for 
 checksums, data validation, or collision detection. Not suitable for cryptographic purposes.
+
+## Returns
+a [number](https://arcade.makecode.com/types/number) of k-bit non-cryptographic hash.
+
+## Example
+Let us calculate the buffer's hash when the bits as 2 when the buffer's length is 30.
+``` ts
+    const buf = Buffer.create(0);
+    let hashValue = 0;
+    if (buffer.length == 30) {
+       hashValue = buffer.hash(2);
+    }
+```