# 2.8 Constant Values

## Defining a constant value

`const(value)`

A constant is an unchanging value i.e. cannot be manipulated through mathematical operations. To create one, simply use the `const` constructor and the value you want to keep constant:

``` python
>> value = const(10)
>>> print(value + 4)
10
>>> print(value * 100)
10
>>> print(value / 99)
10
```

These can be really useful for shifting entire sequences of values except one or two:

``` python
p1 >> pluck([0, 4, const(7), const(6)], dur=1/2) + var([0, -2, -4])
```

Constants can also be used in a PGroup to create constant notes in moving chord sequences:

``` python
p1 >> pluck(var([0, -3, -2, -4], 4), dur=1/2) + (0, 2, const(4))
```