A need is a requirement for survival, eg breathable air a want is a desire it may be the desire for a need (eg a choking person generally wants to be able to breath) or for something not needed for survival, such as chocolate or a new car.
Need vs want although it is true that need and want are two terms used in describing any economic situation, there are differences between the two the two terms are often used in expressions that convey the sense of acquiring things this is the reason they are confused as interchangeable. This change between want and need gives characters their journey there is a difference between where they start and where they end this change also gives an actor a rich palate to play with in terms of character development activities take a fairy tale and identify the main character’s want and need.
The difference between a need and a want is pretty simple—until you set yourself loose in a store double chocolate chip ice cream it's a food, so mark it as a need. A need is something you have to have, something you can't do without a good example is food if you don't eat, you won't survive for long many people have gone days without eating, but they.
Defining needs can be a somewhat controversial topic, especially when we are trying to address psychological or emotional needs, as there seems to be a lot of grey area between needs and wants needs are different from wants in that their deficiency results in a negative outcome. Want vs need when it comes to owning or acquiring certain things, people would often use the terms 'want' and 'need' interchangeably in many cases, the manner in which people would use these two terms can lead one to perceive that these two have similar meanings, if not mean absolutely just the same thing.