/**
 * Returns true at a frequency determined by a given **probability**. A **probability** of one or higher guarantees a
 * return value of true and a **probability** of zero or less guarantees a return value of false.
 */
export declare function chance(probability: number): boolean;
/**
 * Returns a pseudo-random floating point number between zero and one.
 */
export declare function random(): number;
/**
 * Returns a pseudo-random floating point number between zero and an **upper** bound.
 */
export declare function random(upper: number): number;
/**
 * Returns a pseudo-random floating point number between a **lower** and **upper** bound.
 */
export declare function random(lower: number, upper: number): number;
/**
 * Returns a pseudo-random integer between zero and an **upper** bound.
 */
export declare function randomInteger(upper: number): number;
/**
 * Returns a pseudo-random integer between a **lower** and **upper** bound.
 */
export declare function randomInteger(lower: number, upper: number): number;