I'm trying to make a loop where one value goes up while the second goes down.. I cant figure it out. As far as I can see checkNumber counts down correctly, and x and i are incorrect
I know i'm making a silly mistake somewhere but I'm brand new to coding
var checkNumber = 5;
for (var x = 0; x < 5; x++) {
for (var i = 0; i < checkNumber; i++) {
console.log(checkNumber);
checkNumber = checkNumber - 1;
console.log("x",x,"i",i);
}
}Just use a single loop and take the difference of the max value and the actual value (minus one, because of the zero based nature) for the second value.
var value = 5,
i;
for (i = 0; i < value; i++) {
console.log(i, value - i - 1);
}
I'm assuming you're trying to do this:
var checkNumber = 5;
for (var x = 0; x < checkNumber; x++) {
for (var i = checkNumber - 1; i >= 0; i--) {
console.log(checkNumber);
console.log("x", x, "i", i);
}
}This will start i at 4 (minus one to avoid index issues if that's what you're looking for, otherwise remove the -1) and go down to 0.
The first loop will count up until 4.
The trick is to use i-- and set i to something higher, then stop the loop with the second condition in the for.
Does that make sense?
This will make i start at 0 and j start at 4. While i goes up to 4, j will go down to 0.
var checkNumber = 5;
for(var i = 0, j = checkNumber - 1; i < checkNumber; i++, j--){
console.log(i + " " + j);
}
incorrect? What is the output you're expecting?