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The general form of the for statement can be expressed as follows: When using this version of the for statement, keep in mind that: 1  The initialization expression initializes the loop; it's executed once, as the loop begins. 2  When the termination expression evaluates to false, the loop terminates.
When declaring a variable, you can specify a default value using the DEFAULT clause as in line (1). Line (2) shows the declaration of a variable of the Boolean data type with a default value of FALSE. Line (3) shows that a SET statement can be used to assign a single variable value. Variables can also be set by executing a SELECT or FETCH statement in combination with the INTO clause as shown in line (4).