#     Copyright 2016-present CERN – European Organization for Nuclear Research
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.

import numpy as np


def log_to_simple_return(log_return: float) -> float:
    """
    Converts logarithmic return to corresponding simple return.

    Parameters
    ----------
    log_return: float
        logarithmic return

    Returns
    -------
    float
        simple return

    """

    simple_return = np.exp(log_return) - 1
    return simple_return
