Difference between revisions of "If Command"
From GeoGebra Manual
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<noinclude>{{Manual Page}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> | <noinclude>{{Manual Page}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> | ||
+ | {{command|logical}} | ||
; 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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* 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]]. | * 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]]. | ||
* Example: <tt>f(x) = If[x < 3, sin(x), x^2]</tt> yields a function that equals ''sin(x)'' for ''x < 3'' and ''x<sup>2</sup>'' for ''x ≥ 3''. | * Example: <tt>f(x) = If[x < 3, sin(x), x^2]</tt> yields a function that equals ''sin(x)'' for ''x < 3'' and ''x<sup>2</sup>'' for ''x ≥ 3''. | ||
− | * See the section [[Boolean | + | * See the section [[Boolean values]] for the symbols used in conditional statements. |
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Revision as of 05:45, 22 December 2010
- 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.
- See the section Boolean values for the symbols used in conditional statements.