4.1.7 Number literals

The table below lists the postfix character(s) to add to a number literal for type cohesion. To use the new netCDF4 types NCO must be compiled/linked to the netCDF4 library and the output file must be HDF5.

     n1[$time]=1UL;   // n1 will now by type NC_UINT
     n2[$lon]=4b;     // n2 will be of type NC_BYTE
     n3[$lat]=5ull;   // n3 will be of type NC_UINT64
     n3@a1=6.0d;      // attribute will be type NC_DOUBLE
     n3@a2=-666L;     // attribute will be type NC_INT

A floating point number without a postfix will default to NC_DOUBLE. An integer without a postfix will default to type NC_INT. Thre is no postfix for characters. Use a quoted string.

     n4[$rlev]=.1      // n4 will be of type NC_DOUBLE
     n5[$lon_grd]=2.   // n5 will be of type NC_DOUBLE
     n6[$gds_crd]=2e3; // n6 will be of type NC_DOUBLE
     n6@a1=41;         // attribute will be type NC_INT
     n6@a2=-21;        // attribute will be type NC_INT
     n6@units="kelvin" // attribute will be type NC_CHAR

netCDF3/4 Types

b|B

NC_BYTE, a signed 1-byte integer

none

NC_CHAR, an ISO/ASCII character

s|S

NC_SHORT, a signed 2-byte integer

l|L

NC_INT, a signed 4-byte integer

f|F

NC_FLOAT, a single-precision (4-byte) floating point number

d|D

NC_DOUBLE, a double-precision (8-byte) floating point number

netCDF4 Types

ub|UB

NC_UBYTE, an unsigned 1-byte integer

us|US

NC_USHORT, an unsigned 2-byte integer

u|U|ul|UL

NC_UINT, an unsigned 4-byte integer

ll|LL

NC_INT64, a signed 8-byte integer

ull|ULL

NC_UINT64, an unsigned 8-byte integer