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### Real value

A real value can geometrically be represented by a point on the real line.

##### Explanation

We can imagine what a real value is. It is a number with *one* dimension.

For real number, we know the concepts of greater than (>) and less than (<). This indication is not possible for multidimensional numbers. So it does not apply to complex numbers with *two* dimensions, and quaternions with *four* dimensions, and octonions with *eight* dimensions.

##### Examples

Real values are 1, −2, 0, √3, π, ¾ etc. The imaginary unit *i* has no real value, and infinitely large ∞ and infinitely small Δ*x* are no numbers.