if(a < 10)

if(a <= 9)

float a = 9.0
float b = 10.0
float c = 9.5

a < 10  ... true
b < 10  ... false
c < 10  ... true    <--- note this

a <= 9  ... true
b <= 9  ... false
c <= 9  ... false    <--- note this

a.compare(value) < 0  ... true if 'a' is smaller than 'value'
a.compare(value) > 0  ... true if 'a' is bigger than 'value'
a.compare(value) == 0 ... true if 'a' is equal to 'value'

for (int i = 1; i <= 16; i <<= 1)
{
    gz = (~(~gz << i) | pz) & gz; // this is just an example
    go = (go << i) & po | go;
}

for (int i = 0; i <= x; i++)
{
    // anything
}