Floating-point numbers can take on two kinds of exceptional values, infinity and NaN (not-a-number). These values are produced as a result of exceptional or otherwise unresolvable floating point operations. (See also, FLP32-C. Prevent or detect domain and range errors in math functions). Additionally, they can be obtained directly from user input through the aid of methods like Double.valueOf(String s). Failure to detect and handle such values can result in inconsistent behavior.
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\[[IEEE 754|https://www.securecoding.cert.org/confluence/display/seccode/AA.+C+References#AA.CReferences-IEEE7542006|IEEE 754]\]
\[[ISO/IEC 9899:1999|https://www.securecoding.cert.org/confluence/display/seccode/AA.+C+References#AA.CReferences-ISO%2FIEC98991999|ISO/IEC 9899:1999]\]
\[[IEEE 1003.1, 2004|https://www.securecoding.cert.org/confluence/display/seccode/AA.+C+References#AA.CReferences-IEEE1003|IEEE 1003.1, 2004]\] |