Approximation

Approximate value is a value close enough to the value that is expected. For example if the speed limit is 65, but a driver drives with a speed of 63, that speed is approximately equals the speed limit. A driver will not be able to drive exactly 65 mph.

Does approximation always good? Even so approximate value is good for things like a speed, approximate value is not good for speed of a car, we would like to know not an approximate value, but an exact value.

Same is true for the number of floors in a building, If a building to be build with 25 floors, then constructing a building which has 23 floors - approximately 25, will not going to cut it.

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