Arduino File.size()

Description

The File.size() function gets the size of the file.

Syntax

file.size()

Parameters

• file: an instance of the File class that is returned by SD.open()

Returns

• The size of the file in bytes (unsigned long)

Example Code

• Connect the SD Card to your your PC via an USB 3.0 SD Card Reader

Create a arduino.txt file with the below content

• Connect SD Card to Arduino. See Arduino - Micro SD Card tutorial
• Upload below code to Arduino via Arduino IDE

• Open Serial Monitor, you will see as below:

Tutorials

• Arduino - Micro SD Card
• Arduino - Write Variable to SD Card
• Arduino - Read Config from SD Card
• Arduino - Log Data with Timestamp to SD Card

See Also

• Arduino SD Card Library Reference
• Arduino SD.begin()
• Arduino SD.exists()
• Arduino SD.mkdir()
• Arduino SD.rmdir()
• Arduino SD.remove()
• Arduino SD.open()
• Arduino File.close()
• Arduino File.name()
• Arduino File.available()
• Arduino File.flush()
• Arduino File.peek()
• Arduino File.position()
• Arduino File.print()
• Arduino File.println()
• Arduino File.seek()
• Arduino File.size()
• Arduino File.read()
• Arduino File.write()
• Arduino File.isDirectory()
• Arduino File.openNextFile()
• Arduino File.rewindDirectory()
• Arduino File.find()
• Arduino File.findUntil()
• Arduino File.readBytes()
• Arduino File.readBytesUntil()
• Arduino File.readString()
• Arduino File.readStringUntil()
• Arduino File.parseInt()
• Arduino File.parseFloat()
• Arduino File.setTimeout()