Arduino sprintf float

// On arduino, sprintf does not support formatting floats, but it can be done 
// with some simple integer formatting:

float f = 3.14;
sprintf(str, "Float value: %d.%02d", (int)f, (int)(fabsf(f)*100)%100);

// str will now be: "Float value: 3.14"

Source: yaab-arduino.blogspot.com

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