/* String replace() Examples of how to replace characters or substrings of a string created 27 July 2010 modified 2 Apr 2012 by Tom Igoe http://arduino.cc/en/Tutorial/StringReplace This example code is in the public domain. */ void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } // send an intro: Serial.println("\n\nString replace:\n"); Serial.println(); } void loop() { String stringOne = "<html><head><body>"; Serial.println(stringOne); // replace() changes all instances of one substring with another: // first, make a copy of th original string: String stringTwo = stringOne; // then perform the replacements: stringTwo.replace("<", "</"); // print the original: Serial.println("Original string: " + stringOne); // and print the modified string: Serial.println("Modified string: " + stringTwo); // you can also use replace() on single characters: String normalString = "bookkeeper"; Serial.println("normal: " + normalString); String leetString = normalString; leetString.replace('o', '0'); leetString.replace('e', '3'); Serial.println("l33tspeak: " + leetString); // do nothing while true: while(true); }