/**
 * Factory of numeric sequences with the exact step.
 * @param start - a start number of the sequence inclusively.
 * @param end - an end number of the sequence exclusively.
 * @param step - step of the progression. Defaults:
 * - if start <= end, step = 1
 * - if start > end, step = -1.
 * @returns a sequence of numbers in progression, described by bounds with a specific step.
 */
export declare function range(start: number, end?: number, step?: number): number[];
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