Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings.
Longest Common Prefix

Write a function to find the longest common prefix string amongst an array of strings.

Example 1:
Input: ["flower","flow","flight"]
Output: fl
Input
arr =["flower","flow","flight"]

Start: "flower"

String 1
f0l1o2w3e4r5
String 2
f0l1o2w3
String 3
f0l1i2g3h4t5
Variables
VariableValue
prefixflower
DepthFunction Call
Stack empty
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