The difference between affect and effect is often confused by people. Affect is a verb that means to influence or cause a change in something. Effect is a noun that describes the result of a change caused by an action or event.
Affect is used when referring to the cause of a change, while effect is used to refer to the result of the change. For example, if you increase the temperature of a room, the affect would be the increase in temperature and the effect would be the result of the increased temperature, such as the room becoming warmer.
Affect can also be used to describe emotions. For example, if you are feeling sad, the affect would be sadness and the effect could be that you cry or become withdrawn.
When talking about grammar, affect is usually used as a verb and effect as a noun. For example, “The heat affected the room” and “The effect of the heat was that the room became warmer.”
In conclusion, the difference between affect and effect is that affect is a verb used to describe the cause of a change, while effect is a noun used to describe the result of the change.