How to use in-sentence of “Real number”:
+ A non-zero real number can have a negative number as its power.
+ Every real number is a complex number, but not every complex number is a real number.
+ For example, a real number such as “2” can be added to an imaginary number such as “3i” to create “2+3i”.
+ For example, the absolute value of a real number is always non-negative, but is not necessarily positive.
+ Imaginary numbers are numbers that are made from combining a real number with the imaginary unit, called “i”, where “i” is defined as.
+ Only one: a real number without thousand separators.
+ There is no real number that gives −1 when it is squared.
+ A real number is said to be positive if it is greater than zero, and negative if it is less than zero.
