I need help with Snail in The Well project

Question

Problem: The snail climbs up 7 feet each day and slips back 2 feet each night.
How many days will it take the snail to get out of a well with the given depth?

Sample Input:
31

Sample Output:
6

Explanation: Let's break down the distance the snail covers each day:
Day 1: 7-2=5
Day 2: 5+7-2=10
Day 3: 10+7-2=15
Day 4: 15+7-2=20
Day 5: 20+7-2=25
Day 6: 25+7=32
So, on Day 6 the snail will reach 32 feet and get out of the well at day, without slipping back that night.

I need help with this. I don't understand why I get just test case 2, 4 and 5. Can someone help me? If you help, thanks. My code:
function main() {
    var depth = parseInt(readLine(), 10);
    //your code goes here
    x = 0
    for(y = 0; x <= depth;x = x){
        x += 7;
        if(x == depth){
            break
        }
        x -= 2
        if(x == depth){
            break;
        }
        y++
    }
    console.log(y)
}

Answer 1

https://www.sololearn.com/discuss/2634554/?ref=app
https://www.sololearn.com/discuss/2618113/?ref=app
https://www.sololearn.com/discuss/2617598/?ref=app
https://www.sololearn.com/discuss/2624694/?ref=app

Answer 2

function main() {
var depth = parseInt(readLine(), 10);
//your code goes here
var day = 0;
var total = 0;
while (total < depth) {
day = day + 1;
total = total + 7;
if (total >= depth) {
console.log(day);
break;
}
total = total - 2;
}
}

Answer 3

Thanks

Answer 4

If it's not too much to ask, could someone explain this code to me? Like what happened there? I'd appreciate it

Answer 5

I recommend first link in first answer. There first create two variables called A and day. Then create a while loop what repeats until A is higher than or same as depth. There you increase A by 7(A is the position where snail is). Then you increase day by 1, break if A is higher than or same as depth. Then you just decrease A by 2 and print day to log outside the loop. I hope that this explanation is enough and you understand it.

Answer 6

crystal clear. very much appreciated. thanks :)

Answer 7

I tried this one. It turned out correct but I’m not sure if it’s the proper one

for(x=1; x < depth; x++){
let y = x+(x*4);
if ((y+2)>=depth){
break;
}
}
console.log(x)