How to know the password of a wifi one is connected to

Open your cmd
Step1 type:netsh wlan show profiles.
#its going to show you the names of wireless networks you have been connected to
Step 2: copy the name of network you want to hack.
step 4 type:netsh wlan show profiles "wifi name" key=clear.
Step 5: look for security key the you will be able to see its password.