Editing Floating-point arithmetic (section)

=== Literal syntax ===
Literals for floating-point numbers depend on languages. They typically use <code>e</code> or <code>E</code> to denote [[scientific notation]]. The [[C (programming language)|C programming language]] and the [[IEEE 754]] standard also define a [[IEEE 754#Hexadecimal literals|hexadecimal literal syntax]] with a base-2 exponent instead of 10.<!-- Also in [[Hexadecimal#Hexadecimal exponential notation]] --> In languages like [[C (programming language)|C]], when the decimal exponent is omitted, a decimal point is needed to differentiate them from integers. Other languages do not have an integer type (such as [[JavaScript]]), or allow overloading of numeric types (such as [[Haskell (programming language)|Haskell]]). In these cases, digit strings such as <code>123</code> may also be floating-point literals.

Examples of floating-point literals are:
* <code>99.9</code>
* <code>-5000.12</code><!-- do not use ndash, as that isn't part of a literal(?)-->
* <code>6.02e23</code>
* <code>-3e-45</code>
* <code>0x1.fffffep+127</code> in C and IEEE 754