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One of the signal features of Scheme is its support for jumps or nonlocal control. Specifically, Scheme allows program control to jump to arbitrary locations in the program, in contrast to the more restrained forms of program control flow allowed by conditionals and procedure calls. Scheme's nonlocal control operator is a procedure named call-with-current-continuation. We will see how this operator can be used to create a breathtaking variety of control idioms.

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