Num Lock
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Num Lock or Number Lock (⇭) is a key on the numeric keypad of most computer keyboards. It is a lock key, like Caps Lock and Scroll Lock. Its state affects the function of the numeric keypad commonly located to the right of the main keyboard and is commonly displayed by an LED built into the keyboard.
The Num Lock key exists because earlier 84-key IBM PC keyboards did not have cursor control or arrows separate from the numeric keypad. Most earlier computer keyboards had different number keys and cursor control keys; however, to reduce cost, IBM chose to combine the two in their early PC keyboards. Num Lock would be used to select between the two functions. On some laptop computers, the Num Lock key is used to convert part of the main keyboard to act as a (slightly skewed) numeric keypad rather than letters. On some laptop computers, the Num Lock key is absent and replaced by the use of a key combination.[1]
Since Apple keyboards never had a combination of arrow keys and numeric keypad (but some lacked arrow keys, function keys, and a numeric keypad altogether), Apple has keyboards with a separate numeric keypad but no functional Num Lock key. Keyboards manufactured by Apple will instead use a Clear key but not all Apple manufactured keyboards will be provided with it.[2]
| Key on Numeric Keypad |
Num Lock On | Num Lock Off |
|---|---|---|
| 1 | 1 | End |
| 2 | 2 | Down Arrow |
| 3 | 3 | Page Down |
| 4 | 4 | Left Arrow |
| 5 | 5 | does nothing (usually)[3] |
| 6 | 6 | Right Arrow |
| 7 | 7 | Home |
| 8 | 8 | Up Arrow |
| 9 | 9 | Page Up |
| 0 | 0 (zero or comma) | Insert |
| . | . (dot) or , (comma)
|
Delete |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Esc | F1 | F2 | F3 | F4 | F5 | F6 | F7 | F8 | F9 | F10 | F11 | F12 | PrtSc/ SysRq |
Scroll Lock |
Pause/ Break |
|||||||||
 |
Insert | Home | Page Up |
Num Lock |
∕ | ∗ | − | |||||||||||||||||
| Delete | End | Page Down |
7 | 8 | 9 | + | ||||||||||||||||||
| 4 | 5 | 6 | ||||||||||||||||||||||
| ↑ | 1 | 2 | 3 | Enter | ||||||||||||||||||||
| ← | ↓ | → | 0 Ins |
. Del | ||||||||||||||||||||
References
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- ^ Page Module:Citation/CS1/styles.css has no content."Press Fn+F8, F7, or Insert to enable/disable numlock". Lenovo Support. Retrieved 2023-09-18.
- ^ Page Module:Citation/CS1/styles.css has no content."Use your Apple Keyboard in Windows with Boot Camp". Apple Support. Retrieved 2022-01-16.
- ^ Page Module:Citation/CS1/styles.css has no content."keyboard - Has the '5' key on the numeric keypad ever had an alternate function in hardware?". Super User. Retrieved 2022-01-16.
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