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Mathematica > Data Manipulation > Files > Mathematica Expressions in Files >

Put (>>)

expr>>filename
writes expr to a file.

Put[expr₁, expr₂, ..., "filename"]
writes a sequence of expressions expr_i to a file.

Put["filename"]
creates an empty file with the specified name.

Put starts writing output at the beginning of the file. It deletes whatever was previously in the file.

expr>>filename is equivalent to expr>>"filename". The double quotes can be omitted if the file name is of the form specified in "Operator Input Forms".

It is conventional to use names that end with .m for files containing Mathematica input.

Save a computed value in a temporary file:

Set the current directory to one for temporary files:

Put the value of a into a file:

The file now contains the value:

Reset the directory:

Save a computed value in a temporary file:

Set the current directory to one for temporary files:

Put the value of a into a file:

The file now contains the value:

Reset the directory:

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