create a polynom from array in javascript

One way to create a polynomial function from an array of coefficients is to loop through the array and create a string representation of the polynomial using the coefficients as the corresponding power of x. Here's an example implementation:

index.tsx
function createPolynomial(coefficients) {
  let polynomial = '';
  for (let i = 0; i < coefficients.length; i++) {
    const power = coefficients.length - i - 1;
    polynomial += `${coefficients[i]}x^${power}`;
    if (i !== coefficients.length - 1) {
      polynomial += ' + ';
    }
  }
  return polynomial;
}
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This function takes an array of coefficients as an argument and returns a string representation of the corresponding polynomial. For example, if you have the coefficients [3, 0, 2, 4], the function would return the string '3x^3 + 2x^2 + 4x^0'.

Note that this implementation assumes that the array represents the coefficients of the polynomial in decreasing order of power. If the coefficients are given in increasing order, you would need to loop through the array in reverse order instead.