How to save a float variable to the eeprom

Development Boards Arduino
7

You don’t need the library. If you read further in the link, you will see that the library just uses the built in eeprom functions.

Simple program to read/save a float value to four bytes starting at eeprom location zero.

#include <avr/eeprom.h>

float x=1.234;

void setup()
{
  //read value of x from eeprom address 0 upon startup
  eeprom_read_block((void*)&x, (void*)0, sizeof(float));
    // ...
}
void loop()
{

    // if user pushes the "Save" button, save the value of x in location 0
    if (digitalRead(13) == HIGH)
      eeprom_write_block((const void*)&x, (void*)0, sizeof(float));
  //...
}