SUBTRACT

Basic form

SUBTRACT n1 FROM n2.

Effect

Subtracts the contents of n1 from the contents of n2 and stores the result in n2 .

This is equivalent to: n2 = n2 - n1.

Example


DATA NUMBER TYPE P VALUE 3,
     RESULT TYPE I VALUE 7.
SUBTRACT NUMBER FROM RESULT.

The field RESULT now contains 4; the value of NUMBER remains unchanged at 3.

Note

Performance
The remarks about conversions and performance under COMPUTE apply equally to SUBTRACT .
The runtime required to subtract two numbers of type I or F is approx. 2 msn (standardized microseconds). For numbers of type P, about 9 msn are needed.

Note

Runtime errors

BCD_BADDATA : P field contains no correct BCD format

BCD_FIELD_OVERFLOW : Result field is too small (type P )

BCD_OVERFLOW : Overflow with arithmetic operation (type P )

COMPUTE_INT_MINUS_OVERFLOW : Whole number overflow during subtraction