Parameter Passing: Difference between revisions
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===Example [[Fortran]]=== |
===Example [[Fortran]]=== |
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Early versions of the language used only by reference parameter passing for the arguments. |
Early versions of the language used only by reference parameter passing for the arguments. |
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Starting from Fortran 90 (and later), functions and subroutines can specify an ''intent'' for the argument; intent can be: '''in''' (unmodificable argument), '''out''' (argument used to return a value; the starting value must be intended not significative, undefined), '''inout''' (argument both is intended for input and can be modified, i.e. return the value modified by the function/subroutine). |
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Trying to modify an argument with ''intent in'' triggers an error at compile time. |
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