What will be the output ?

Question

let a,b,c
a=1
b=5
c=7

if(++b - a == b++)
{
console.log(b)
}
else{
console.log(c-b)
}

Answer 1

It took me a while to understand but, look:
++b inside if condition increases b by 1 so b is now 6 and the condition is that:
if ( 6 - a == 6 ) which is false
ELSE block would be executed under it.

++a and a++ both have increased b by 1 so now b is 7.

Inside ELSE:
c - b = 7 - 7 = 0 would be the output