Nested For Loops

Hi, I am using an LCD, I am a true novice, the code below is supposed to print hash characters to all the cells on the screen, it will work if I comment out either one of the loops, and add int x=0, or int y=0 where appropriate, but not as it is…Atghhhhh!!

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3,POSITIVE);

void setup() {



void loop() {

for (int y; y<4; y++){
for (int x; x<20; x++){



for (int y = 0; y<4; y++){
for (int x = 0; x<20; x++){

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Thank you, I will try it later......still learning.