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### Theory:

A number line is defined as a straight line with numbers placed at equal interval along its length. It is usually represented horizontally, and it can be extended infinitely in any direction.

Visualising the integers on the number line is pretty easy when compared to the numbers with more decimal expansion.

Example:

We can locate the integers directly on the number line.

Suppose we want to locate point \(6\) on the number line, then we can mark it as follows: