import { MessageFunctionType, Result } from '../types';
export interface IsFloatErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_FLOAT_ERRORS: IsFloatErrors;
/**
 * Tests whether the `target` string is a float
 *
 * @param target The target string
 * @param options The options
 * ### Example
 * ```
 * expect(isFloat('123.123').value).toBeTruthy()
 * ```
 */
export declare function isFloat(target: string, options?: any): Result<boolean | undefined>;
export declare const floatLocales: string[];