text: import { isInteger } from '../../utils/number.js';
  import { product } from '../../utils/product.js';
  export function combinationsNumber(n, k) {
    if (!isInteger(n) || n < 0) {
      throw new TypeError('Positive integer value expected in function combinations');
    }
  
    if (!isInteger(k) || k < 0) {
      throw new TypeError('Positive integer value expected in function combinations');
    }
  
    if (k > n) {
      throw new TypeError('k must be less than or equal to n');
    }
  
    var nMinusk = n - k;
    var prodrange;
  
    if (k < nMinusk) {
      prodrange = product(nMinusk + 1, n);
      return prodrange / product(1, k);
    }
  
    prodrange = product(k + 1, n);
    return prodrange / product(1, nMinusk);
  }
  combinationsNumber.signature = 'number, number';