I am trying to solve the challenge of the topic: Increment a Number with Javascript,
according to what i read there are 2 ways of solve this problem :
Postfix
var x = 3;
y = x++; // y = 3, x = 4
Prefix
var a = 2;
b = ++a; // a = 3, b = 3
This was my code before reading the post :
var myVar;
var myVar=88;
myVar++; (because the challenge asked me to change the following:
myVar = myVar +1 ; )
I was trying and trying to solve that part without sucess and then i read a post of november 2018
and i used the alternative Prefix and it worked but i don´t know when i should use the alternative
postfix and the alternative prefix.
Now my code which is working good is the following
var myVar = 87;
++myVar;
Could anyone please explain me which is the difference between using a postfix alternative and a prefix alternative? and in which cases i can use it?
I will appreciate your kind help
Kind regards,
Ivonne
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**Link to the challenge:**
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/increment-a-number-with-javascript/
You don’t need to use a pre-increment. I suspect that there was something else going on with your code. What was the full code of your solution that didn’t pass the tests?
Thank you ArielLeslie, i appreciate the help,
I send you 2 pictures attached of my code, and now it seems that
i need to end all the indications to continue studying but i don´t know why
the last part which says don´t change the code above the line does not works good.
Well, you changed line 1 and you also put code above the line that says “do not change code above the line”
It has nothing to do with whether you use ++var or var++.
And do you know if there is any possibility of refresh the page and find it like in the beggining so i can not make the same mistakes? Because i was trying to do it but it continues to carry me to the same page changed with my mistakes.
I thank you so much and appreciate your kind help
thank you so much and have a wonderful day dear ArielLeslie,
Kind regards,
Ivonne (it´s nice to meet you)
