rounds the quantity
in expression to the figure
given in round-off-unit. The expression can
be a numeric variable name, a numeric constant, or an arithmetic expression.
Separate round-off-unit from expression with
a comma.
SUM (expression-1<, expression-2>,
. . .)
produces the sum of
all expressions that you specify in the parentheses. The SUM function
ignores missing values as it calculates the sum of the expressions.
Each expression can be a numeric variable, a numeric constant, another
arithmetic expression, or another numeric function.
Statements
LENGTH variable-listnumber-of-bytes;
indicates that the
variables in the variable-list are
to be stored in the data set according to the number-of-bytes that
you specify. Numeric variables are not affected while they are in
the program data vector. The default length for a numeric variable
is 8 bytes. In general, the minimum that you should use is 4 bytes
for variables that contain integers and 8 bytes for variables that
contain fractions. You can assign lengths to both numeric and character
variables (discussed in the next section) in a single LENGTH statement.
variable=expression;
is an assignment statement.
It causes SAS to calculate the value of the expression on the right
side of the equal sign and assign the result to the variable on
the left. When variable is
numeric, the expression can be an arithmetic calculation, a numeric
constant, or a numeric function.