5.6 Constants and Symbols

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Several elements represent commonly used constants (such as π, , e, or i) and symbols (such as those used to denote the set of all integers or the set of all complex numbers). A list of all content elements of this type is given in Table 5.4.

Table 5.4: Content Elements That Represent Constants and Symbols
Element	Default Rendering	Meaning
`pi`	π	The ratio of a circle's circumference to its diameter (approx. 3.141592653)
`exponentiale`	e	The base of the natural logarithm
`imaginaryi`	i	The (imaginary) square root of −1
`notanumber`	NaN	Not a number
`true`	true	The Boolean value True
`false`	false	The Boolean value False
`emptyset`	Ø	An empty set
`eulergamma`	γ	Euler's constant (approx. 0.5772156649)
`infinity`		Infinity
`integers`	Z	The set of all integers
`reals`	R	The set of all real numbers
`rationals`	Q	The set of all rational numbers
`naturalnumbers`	N	The set of all natural numbers
`complexes`	C	The set of all complex numbers
`primes`	P	The set of all prime numbers

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