Set the current directory to one for temporary files:

Compute a value and save it in a file using Put:

The file now contains the value:

Compute another value and save it in the same file using PutAppend:

The file contains both results:

Reset the directory:

Create a cloud object storing a value:

Append additional values to the cloud object:

Import the values back into the current session:

Append expression to the file specified by the File object:

Create a file and open it for writing:

Put several expressions to the stream:

Close the stream:

The file contents were written using the CharacterEncoding option of the stream:

Create the first value that will be stored in a temporary file:

Set the current directory to one for temporary files:

Put the value of x in a file:

Update x and append the new value to the file:

The file now contains the two values:

Append successive iterates to the file in a loop:

Compare the last line with a direct computation:

Reset to the original directory:

PutAppend will create a file if the named file to append to does not exist:

Even though file was deleted, PutAppend recreated the file and stored the result in it:

PutAppend always adds to file contents:

Both expressions are in the file:

Use Put to overwrite existing file contents:

The form expr>>>filename treats filename as a literal name, not an expression to be evaluated:

The file that was written is called "file", not the name contained in the variable file:

Use the form PutAppend[expr,filename] to write to the file whose name is stored in file: