Sum

Sum

Adds the result of an expression to an accumulator variable

Valid: in a DATA step

Category: Action

Type: Executable

Syntax

variable+expression;

Tip:	The variable is automatically set to 0 before SAS reads the first observation. The variable's value is retained from one iteration to the next, as if it had appeared in a RETAIN statement.
Tip:	To initialize a sum variable to a value other than 0, include it in a RETAIN statement with an initial value.

Tip:	The expression is evaluated and the result added to the accumulator variable.
Tip:	SAS treats an expression that produces a missing value as zero.

retain variable 0;
variable=sum(variable,expression);

See Also

Statement:

RETAIN

Function:

SUM