What is the purpose of number lock in the PC?
Num Lock Short for numeric lock or number lock, the Num Lock key is located on the numeric keypad of the keyboard and enables and disables the numeric pad. Turning the Num Lock on will allow the user to use the numbers on the keypad and turning the Num Lock off will enable the keys other functions such as using the keypad as an arrow pad. As can be seen below the blue LED indicates that the Num Lock is enabled on this keyboard.