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-.. _arduino-sizeof:
-
-sizeof
-======
-
-Description
------------
-
-The sizeof operator returns the number of bytes in a variable type,
-or the number of bytes occupied by an array.
-
-
-
-Syntax
-------
-
-sizeof(variable)
-
-
-
-Parameters
-----------
-
-variable: any variable type or array (e.g. int, float, byte)
-
-
-
-Example code
-------------
-
-The sizeof operator is useful for dealing with arrays (such as
-strings) where it is convenient to be able to change the size of
-the array without breaking other parts of the program.
-
-
-
-This program prints out a text string one character at a time. Try
-changing the text phrase.
-
-
-
-::
-
- char myStr[] = "this is a test";
- int i;
-
- void setup(){
- Serial.begin(9600);
- }
-
- void loop() {
- for (i = 0; i < sizeof(myStr) - 1; i++){
- Serial.print(i, DEC);
- Serial.print(" = ");
- Serial.println(myStr[i], BYTE);
- }
- }
-
-
-Note that sizeof returns the total number of bytes. So for larger
-variable types such as ints, the for loop would look something like
-this.
-
-
-
-::
-
- for (i = 0; i < (sizeof(myInts)/sizeof(int)) - 1; i++) {
- // do something with myInts[i]
- }
-