# Difference between revisions of "If Command"

From GeoGebra Manual

m (1 revision) |
|||

Line 3: | Line 3: | ||

; 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''. | ||

− | + | {{warning|Both objects must be of the same type.}} | |

− | + | ===Conditional Functions=== | |

− | * 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'' | + | 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'' | |

+ | {{note|See the section [[Boolean values]] for the symbols used in conditional statements.^^ |

## Revision as of 00:31, 4 February 2011

- 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*.

Warning: | Both objects must be of the same type. |

### Conditional Functions

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*x*for^{2}*x ≥ 3*

{{note|See the section Boolean values for the symbols used in conditional statements.^^