Find the next perfect square!

Description:

You might know some pretty large perfect squares. But what about the NEXT one?

Complete the findNextSquare method that finds the next integral perfect square after the one passed as a parameter. Recall that an integral perfect square is an integer n such that sqrt(n) is also an integer.

If the parameter is itself not a perfect square then -1 should be returned. You may assume the parameter is non-negative.

Examples:(Input --> Output)

121 --> 144
625 --> 676
114 --> -1 since 114 is not a perfect square

 

 

 

Solution:

1. Find the root value of sq.
2. Check if the root value is divisible by 1.
3. When divisible, add 1 to the root value and find the square root.
4. If not divisible, -1 is returned.

 

function findNextSquare(sq) {
  x = sq**0.5
  return x % 1 ? -1 : (x+1)**2
}

The value to find the root is the same as in Python. Use '**'.

 

 

In JavaScript, the ternary operator can be used in the following form.

condition ? exprIfTrue : exprIfFalse

 

 

 

 

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Reference:

Conditional_Operator