SAS 9.1 Language Reference Dictionary, Volumes 1, 2 and 3

Executes statements in a DO loop repetitively until a condition is true

Valid: in a DATA step

Category: Control

Type: Executable

Syntax

DO UNTIL ( expression );

END ;

Arguments

(expression)

Details

The expression is evaluated at the bottom of the loop after the statements in the DO loop have been executed. If the expression is true, the DO loop does not iterate again.

Note: The DO loop always iterates at least once.

Comparisons

There are three other forms of the DO statement:

Examples

These statements repeat the loop until N is greater than or equal to 5. The expression N>=5 is evaluated at the bottom of the loop. There are five iterations in all (0, 1, 2, 3, 4).

n=0; do until(n>=5); put n=; n+1; end;

See Also

Statements:

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