NGWS SDK Documentation  

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2.5.3.3 Real literals

real-literal:
decimal-digits . decimal-digits exponent-partopt real-type-suffixopt
. decimal-digits exponent-partopt real-type-suffixopt
decimal-digits exponent-part real-type-suffixopt
decimal-digits real-type-suffix
exponent-part:
e signopt decimal-digits
E signopt decimal-digits
sign: one of
+ -
real-type-suffix: one of
F f D d M m

If no real type suffix is specified, the type of the real literal is double. Otherwise, the real type suffix determines the type of the real literal, as follows:

If the specified literal cannot be represented in the indicated type, then a compile-time error occurs.