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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]
+    }
+