Loops

Put spaces in between mathematical operators as if they are alone.

Put spaces after semicolons.

BAD:

for(int i=0;i<100;i++){
  
}

GOOD:

for(int i = 0; i < 100; ++i) {
  
}

In a for loop, instead of i++, try ++i. The latter has one less operation.

EXCEPTION: Whether the ++ goes before or after the variable affects operator precedence. If the post fix version (i++) is required for order of operations purpose, use it.

Prefer while loops to do...while. The former is easier to understand at a glance.