Difference between revisions of "If Command"

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m (improve category sort - simple version)
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; If[Condition, Object]: Yields a copy of the object if the condition evaluates to ''true'', and an undefined object if it evaluates to ''false''.
 
; If[Condition, Object]: Yields a copy of the object if the condition evaluates to ''true'', and an undefined object if it evaluates to ''false''.
 
; If[Condition, Object a, Object b]: Yields a copy of object ''a'' if the condition evaluates to ''true'', and a copy of object ''b'' if it evaluates to ''false''.
 
; If[Condition, Object a, Object b]: Yields a copy of object ''a'' if the condition evaluates to ''true'', and a copy of object ''b'' if it evaluates to ''false''.
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<div class="note">'''Note:'''
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* The ''If'' command can be used to create conditional functions.  Such conditional functions may be used as arguments in any command that takes a function argument, such as [[Derivative Command|Derivative]], [[Integral Command|Integral]], and [[Intersect Command|Intersect]].
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* Example: ''f(x) = If[x < 3, sin(x), x^2]'' yields a function that equals sin(x) for x < 3 and x<sup>2</sup> for x ≥ 3.
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Revision as of 23:50, 25 October 2009

If[Condition, Object]
Yields a copy of the object if the condition evaluates to true, and an undefined object if it evaluates to false.
If[Condition, Object a, Object b]
Yields a copy of object a if the condition evaluates to true, and a copy of object b if it evaluates to false.
Note:
  • The If command can be used to create conditional functions. Such conditional functions may be used as arguments in any command that takes a function argument, such as Derivative, Integral, and Intersect.
  • Example: f(x) = If[x < 3, sin(x), x^2] yields a function that equals sin(x) for x < 3 and x2 for x ≥ 3.
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