TraceForward
is an option for Trace and related functions which specifies whether to include later expressions on the evaluation chain that contains the pattern form sought.
Details
- TraceForward->True includes the final expression on the evaluation chain that contains form.
- TraceForward->All includes all expressions after form on the evaluation chain that contains form.
- TraceForward allows you to see the transformations performed on an expression generated during an evaluation.
Examples
Basic Examples (1)
A recursive definition for finding Fibonacci numbers:
fib[0] = fib[1] = 1;fib[n_] := fib[n - 1] + fib[n - 2];Show only what evaluations of fib are encountered:
Trace[fib[3], _fib]Show only the evaluations of fib and the results:
Trace[fib[3], _fib, TraceForward -> True]Show all intermediate evaluations between calls of fib and the result:
Trace[fib[3], _fib, TraceForward -> All]Text
Wolfram Research (1991), TraceForward, Wolfram Language function, https://reference.wolfram.com/language/ref/TraceForward.html.
CMS
Wolfram Language. 1991. "TraceForward." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/TraceForward.html.
APA
Wolfram Language. (1991). TraceForward. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/TraceForward.html