Barograph Arduino nano

Projects Programming
1

Hi, I´m trying to get my first project with the arduino done, so sorry for any stupid questions, but I´m trying to learn.
I´m following an instruction for building an barograph, but when I try to test the scetch it shows following error message:
Arduino: 1.8.10 (Windows 10), Board: "Arduino Nano, ATmega328P"

C:\Users\Dahabcon\Documents\Arduino\libraries\Adafruit_GFX\glcdfont.c:9:23: error: variable 'font' must be const in order to be put into read-only section by means of 'attribute((progmem))'

static unsigned char font[] PROGMEM = {

^~~~
What does that mean? Any idea how i could get around it?
Thank you so much!!

2

variable 'font' must be const in order to be put into read-only section

It means exactly what it says. One solution would probably be to declare the font variable const