String.replace()

Description

The String replace() function allows you to replace all instances of a given character with another character. You can also use replace to replace substrings of a String with a different substring.

Syntax

myString.replace(substring1, substring2)

Parameter Values

  • myString: a variable of type String.
  • substring1: another variable of type String.
  • substring2: another variable of type String.

Return Values

  • Nothing

Example Code

void setup() { Serial.begin(9600); String substring1 = "Arduino"; String substring2 = "ArduinoGetStarted.com"; String myString = "Hello Arduino!"; Serial.println(myString); // string before myString.replace(substring1, substring2); Serial.println(myString); // string after } void loop() { }

The result on Serial Monitor:

COM6
Send
Hello Arduino! Hello ArduinoGetStarted.com!
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

※ NOTES AND WARNINGS:

If the string is modified, it is highly recommended using String.reserve() to prevent the memory fragmentation issue

See Also

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Arduino UNO R3
Arduino Starter Kit
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