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Text File | 1993-10-26 | 1.2 KB | 26 lines | [TEXT/$Tcl] |
-
- for start test next body
-
-
- DESCRIPTION
- For is a looping command, similar in structure to the C for
- statement. The start, next, and body arguments must be Tcl
- command strings, and test is an expression string. The for
- command first invokes the Tcl interpreter to execute start.
- Then it repeatedly evaluates test as an expression; if the
- result is non-zero it invokes the Tcl interpreter on body,
- then invokes the Tcl interpreter on next, then repeats the
- loop. The command terminates when test evaluates to 0. If
- a continue command is invoked within body then any remaining
- commands in the current execution of body are skipped; pro-
- cessing continues by invoking the Tcl interpreter on next,
- then evaluating test, and so on. If a break command is
- invoked within body or next, then the for command will
- return immediately. The operation of break and continue are
- similar to the corresponding statements in C. For returns
- an empty string.
-
-
- KEYWORDS
- for, iteration, looping
-