Skip to main content

This is documentation for Caché & Ensemble. See the InterSystems IRIS version of this content.

For information on migrating to InterSystems IRIS, see Why Migrate to InterSystems IRIS?


Adds two floating point numbers.




num An expression that resolves to a numeric value.


The FADD function adds two numbers and returns the result. If a num value is a null string or a non-numeric value, FADD parses its value as 0 (zero).

You can perform the same operation using the addition operator (+). Refer to the Operators page of this manual.

Arithmetic Operations

  • To perform arithmetic operations on floating point numbers, use the FADD, FSUB, FMUL, and FDIV functions, or use the standard arithmetic operators.

  • To perform arithmetic operations on numeric strings, use the SADD, SSUB, SMUL, and SDIV functions.

  • To perform integer division, use the DIV function. To perform modulo division, use the MOD function.

  • To perform arithmetic operations on corresponding elements of dynamic arrays, use the ADDS, SUBS, MULS, DIVS, and MODS functions.

  • To add together the element values within a single dynamic array, use either the SUM function (for single-level dynamic arrays) or the SUMMATION function (for multi-level dynamic arrays).

  • To perform numeric comparison operations, use the SCMP function, or use the standard comparison operators.


The following example uses the FADD function to add two floating point numbers:

PRINT FADD(a,b);  ! returns 22.2

See Also