JS- The Snail in the Well

Question

Need help with this project, will sb guide me?

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.

Answer 1

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

Answer 2

Thanks!