Can I use For loops to pick up password of other users in web? And how to do it?

Question

Pick up a password

Answer 1

Like brute force? Constantly guessing a password until it's correct.

Answer 2

better use "while" wrong password until you find the correct one to login in that exits the loop

Answer 3

Short answer: Technically - yes, actually - no.
Long answer: even if you manage to write a code to brute force someone’s password in web (avoid the security and stuff), the process will take ages before it finds the right one. The reason is that, for instance, 8-character password has more than 10^15 combinations of letters, symbols and digits.