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Test recursive power function versus iterative

Preparation code

<script>
  function power(base, exponent) {
    return exponent == 0? 1 : base * power(base, exponent - 1);
  }
  
  function powerNR(base, exp) {
    var result = 1;
    while(exp--) {
      result *= base;
    }
    return result;
  }
  var x = 5, y = 11;
</script>

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power(x, y)

powerNR(x, y)

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