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# Field Types

`“CUST:C(10),NAME:C(30),BALANCE:N(14)”`

The bold letters above define the type of field in that portion of the string. You have several options:

Variable | Description
C | character string
N | numeric string
I | signed binary integer
U | unsigned binary integer
F | IEEE binary floating-point value (8 bytes)
D | BCD floating-point value (8 bytes)
B | BBx business floating-point value (8 bytes)
X | local float (C) value (4 bytes)
Y | local float (C) value (8 bytes)