21 replies to this topic

[megabraker]

print('Enter a number:');
nbr=input();
aprox=0.0001;
dif,root=0.0001*0.0001-nbr,0.0001
print nbr,'\'s root is',nbr**0.5;

[heisenbug]

The bitwise sqrt operation.

Spoiler

I love this famous piece of code.

float Sqrt(float x) {
     float xhalf = 0.5f*x;
     int i = *(int*)&x;
     i = 0x5f3759df - (i>>1);
     x = *(float*)&i;
     x = x*(1.5f-xhalf*x*x);
     x = 1/x;
     return x;
}