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— Statements —

ADD

This document covers the following topics:

Function
Syntax 1 - ADD Statement without GIVING Clause
Syntax 2 - ADD Statement with GIVING Clause
Example

Belongs to Function Group: Arithmetic and Data Movement Operations

Function

The ADD statement is used to add two or more operands.

This statements has two different syntax structures.

Notes:

At the time the ADD statement is executed, each operand used in the arithmetic operation must contain a valid value.
For additions involving arrays, see also the section Arithmetic Operations with Arrays.
As for the formats of the operands, see also the section Performance Considerations for Mixed Formats.

Syntax 1 - ADD Statement without GIVING Clause

ADD [ROUNDED]

(arithmetic-expression)
operand1

TO operand2

For an explanation of the symbols used in the syntax diagram, see Syntax Symbols.

Operand Definition Table (Syntax 1):

Operand	Possible Structure						Possible Formats													Referencing Permitted	Dynamic Definition
`operand1`	C	S	A		N				N	P	I	F		D	T					yes	no
`operand2`		S	A		M				N	P	I	F		D	T					yes	yes

Syntax Element Description:

arithmetic-expression See Arithmetic Expression in the COMPUTE statement.

Syntax Element	Description:
`arithmetic-expression`	See Arithmetic Expression in the `COMPUTE` statement.
`operand1TO operand2`	Operands: `operand1` and `operand2` are summands. The result is stored in `operand2` (result field). Hence, the statement is equivalent to: `operand2` := `operand2` + `operand1` + ...
`ROUNDED`	ROUNDED Option: If the keyword `ROUNDED` is used, the result will be rounded. For information on rounding, see Rules for Arithmetic Assignment, Field Truncation and Field Rounding in the Programming Guide.

operand1

 TO
                              operand2

Operands:

operand1 and operand2 are summands. The result is stored in operand2 (result field). Hence, the statement is equivalent to:

operand2 := operand2 + operand1 + ...

ROUNDED

ROUNDED Option:

If the keyword ROUNDED is used, the result will be rounded.

For information on rounding, see Rules for Arithmetic Assignment, Field Truncation and Field Rounding in the Programming Guide.

Example:

The statement

ADD #A(*) TO #B(*)  is equivalent to  COMPUTE #B(*) := #A(*) + #B(*)
ADD #S    TO #R     is equivalent to  COMPUTE #R    := #S + #R 
ADD #S #T TO #R     is equivalent to  COMPUTE #R    := #S + #T + #R
ADD #A(*) TO #R     is equivalent to  COMPUTE #R    := #A(*) + #R

Syntax 2 - ADD Statement with GIVING Clause

ADD [ROUNDED]

(arithmetic-expression)
operand1

GIVING operand2

For an explanation of the symbols used in the syntax diagram, see Syntax Symbols.

Operand Definition Table (Syntax 2):

Operand	Possible Structure						Possible Formats												Referencing Permitted	Dynamic Definition
`operand1`	C	S	A		N				N	P	I	F		D	T				yes	no
`operand2`		S	A		M		A	U	N	P	I	F	B*	D	T				yes	yes

* Format B of operand2 may be used only with a length of less than or equal to 4.

Syntax Element Description:

arithmetic-expression See Arithmetic Expression in the COMPUTE statement.

Syntax Element	Description:
`arithmetic-expression`	See Arithmetic Expression in the `COMPUTE` statement.
`operand1` `GIVING operand2`	Operands: `operand1` is a summand. `operand2` is only used to receive the result of the operation; it is not included in the addition. Hence, the statement is equivalent to: `operand2` := `operand1` + ...
`ROUNDED`	ROUNDED Option: If the keyword `ROUNDED` is used, the result will be rounded. For information on rounding, see Rules for Arithmetic Assignment, Field Truncation and Field Rounding in the Programming Guide.

operand1

GIVING
                              operand2

Operands:

operand1 is a summand. operand2 is only used to receive the result of the operation; it is not included in the addition. Hence, the statement is equivalent to:

operand2 := operand1 + ...

ROUNDED

ROUNDED Option:

If the keyword ROUNDED is used, the result will be rounded.

For information on rounding, see Rules for Arithmetic Assignment, Field Truncation and Field Rounding in the Programming Guide.

Note:
If Syntax 2 is used, the following applies: Only the (operand1) field(s) left of the keyword GIVING are the terms of the addition, the field right of the keyword GIVING (operand2) is just used to receive the result value. If just a single (operand1) field is supplied, the ADD operation turns into an assignment.

Example:

The statement

ADD #S       GIVING #R  is equivalent to  COMPUTE #R := #S

ADD #S #T    GIVING #R  is equivalent to  COMPUTE #R := #S + #T

ADD #A(*) 0  GIVING #R  is equivalent to  COMPUTE #R := #A(*) + 0
                        which is a legal operation, due to the rules defined
                        in Arithmetic Operations with Arrays

ADD #A(*)    GIVING #R  is equivalent to  COMPUTE #R := #A(*)
                        which is an illegal operation, due to the rules
                        defined in Assignment Operations with Arrays

Example

** Example 'ADDEX1': ADD                                                
************************************************************************
DEFINE DATA LOCAL                                                       
1 #A      (P2)                                                          
1 #B      (P1.1)                                                        
1 #C      (P1)                                                          
1 #DATE   (D)                                                           
1 #ARRAY1 (P5/1:4,1:4) INIT (2,*) <5>                                   
1 #ARRAY2 (P5/1:4,1:4) INIT (4,*) <10>                                  
END-DEFINE                                                              
*                                                                       
ADD +5 -2 -1 GIVING #A
WRITE NOTITLE 'ADD +5 -2 -1 GIVING #A' 15X '=' #A                       
*                                                                       
ADD .231 3.6 GIVING #B
WRITE       / 'ADD .231 3.6 GIVING #B' 15X '=' #B                       
*                                                                       
ADD ROUNDED 2.9 3.8 GIVING #C
WRITE       / 'ADD ROUNDED 2.9 3.8 GIVING #C' 8X '=' #C 
*                                                  
MOVE *DATX TO #DATE                                
ADD 7 TO #DATE
WRITE       / 'CURRENT DATE:'     *DATX (DF=L) 13X 
              'CURRENT DATE + 7:' #DATE (DF=L)     
*                                                  
WRITE       / '#ARRAY1 AND #ARRAY2 BEFORE ADDITION'
            / '=' #ARRAY1 (2,*) '=' #ARRAY2 (4,*)  
ADD #ARRAY1 (2,*) TO #ARRAY2 (4,*)
WRITE       / '#ARRAY1 AND #ARRAY2 AFTER ADDITION' 
            / '=' #ARRAY1 (2,*) '=' #ARRAY2 (4,*)  
*                                                  
END

Output of Program ADDEX1:

ADD +5 -2 -1 GIVING #A               #A:   2                             
                                                                         
ADD .231 3.6 GIVING #B               #B:  3.8                            
                                                                         
ADD ROUNDED 2.9 3.8 GIVING #C        #C:  7                              
                                                                         
CURRENT DATE: 2005-01-10             CURRENT DATE + 7: 2005-01-17        
                                                                         
#ARRAY1 AND #ARRAY2 BEFORE ADDITION                                      
#ARRAY1:      5      5      5      5 #ARRAY2:     10     10     10     10
                                                                         
#ARRAY1 AND #ARRAY2 AFTER ADDITION                                       
#ARRAY1:      5      5      5      5 #ARRAY2:     15     15     15     15

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