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Problem

Reverse a String

Easy
  • strings

Return str with its characters in the opposite order.

Example 1
Input
str = "hello"
Output
"olleh"
Explanation

the last letter comes first and the first letter comes last.

Example 2
Input
str = ""
Output
""
Explanation

an empty string has nothing to reorder.

Constraints:

  • 0 <= str.length <= 10^4

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