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In fasting, we learn to give up something that we like to do. We experience urges and cravings but practice denying our desires

In Buddhism, fasting is an initial stage of self-discipline to acquire self-control.
In Islam, the fast is intended to bring the faithful closer to God and to remind them of the suffering of those less fortunate.
In Christianity, fasting and prayer are often linked together (Luke 2:37; 5:33). Fasting takes your eyes off the things of this world to focus completely on God.
In Hinduism, fasting indicates the denial of the physical needs of the body for the sake of spiritual gains.