The Clayton, CA pollution index is the sum of the most hazardous air pollutants displayed in pounds. The Clayton, CA pollution index is 24.4% less than the California average and 170.1% greater than the national average.
Definition of real. 1  1 : of or relating to fixed, permanent, or immovable things (such as lands or tenements)
Another descriptions of reals is a number with a decimal point or an exponent (or both), thus 2e2 would be a real literal using this definition. Like integer literals, a positive or negative sign can precede the number and no commas are allowed.