Text adoption mail is often included in the term direct response mail, but by its very nature and objectives it really should be in a category of its own. With this type of mailing the publisher expects to receive exam copy requests and future orders for classroom use.
The PL/SQL WHILE Loop. The WHILE loop, also called a conditional loop, evaluates a condition before each loop executes, and if false, the loop is terminated. If the expression is false when the program reaches the WHILE loop, the loop code is jumped and never executed.Use a WHILE loop when the condition test is required at the start of the loop. The next example contains three WHILE loops.The last loop will never execute because the condition will never be true. The middle loop uses multiple condition tests, using the AND key word.se a WHILE loop when the condition test is required at the start of the loop. The next example contains three WHILE loops. The last loop will never execute because the condition will never be true. The middle loop uses multiple condition tests, using the AND key word.
Because the test of the while expression takes place before each execution of the loop, a while loop executes zero or more times. This differs from the do loop, which executes one or more times. A while loop can be terminated when a break, goto, return, or throw statement transfers control outside the loop.To pass control to the next iteration without exiting the loop, use the continue statement.ecause the test of the while expression takes place before each execution of the loop, a while loop executes zero or more times. This differs from the do loop, which executes one or more times. A while loop can be terminated when a break, goto, return, or throw statement transfers control outside the loop.