/**
 * Generates a random number from a range with a specified step.
 *
 * @param min - The minimum value (inclusive).
 * @param max - The maximum value (inclusive).
 * @param step - The step size (default: 1).
 * @returns A random number from the range.
 *
 * @throws {Error} If parameters are invalid (NaN, min > max, step <= 0, etc.).
 *
 * @example
 * // Random from 0, 5, 10, 15, 20
 * randomFromRange(0, 20, 5); // 10
 *
 * @example
 * // Random from 0.0, 0.5, 1.0, 1.5, 2.0
 * randomFromRange(0, 2, 0.5); // 1.5
 *
 * @example
 * // Random even number from 2 to 10
 * randomFromRange(2, 10, 2); // 6
 *
 * @complexity Time: O(n) where n is (max-min)/step, Space: O(n)
 */
export declare function randomFromRange(min: number, max: number, step?: number): number;
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