{Begin Chapter Conditionals and Iterative Statements} {Title Conditionals and Iterative Statements} {Text In order to do any but the simplest computations, it is necessary to test values and execute expressions conditionally, and to execute a series of expressions. Interlisp supplies a large number of predicates, conditional functions, and control functions. Also, there is a complex "iterative statement" facility which allows the user to easily create complex loops and iterative constructs ({PageRef Tag IterativeStatement}). {Include Conditionals} {Include PROG} {Include IterativeStatements} }{End Chapter Conditionals and Iterative Statements}