I need identification help. I'm still a bit of a newb

Question

I have got a game and I'm struggling as the tutorial nothing more than the attached code so I would be so thankful if anyone can tell me what I am playing with lol.

if input >0{
input +1;
}
else{
input -1;
}

please help me someone,
what is this code called. I'm still learning html and i'm more than a little confused with this.
thanks in advance