## Sample Code
```python
# Create a dictionary
graphics = {"pixel": "Picture Element", "resolution": "Number of pixels on screen", "bitmap":"Image composed of pixels"}
# Print a value
print(graphics["pixel"])
# Loop through the keys
for key in graphics:
print(key)
# Loop through keys and values (note the .items()!)
for key, value in graphics.items():
print(key, " is ", value)
# Add an entry to the dictionary
graphics["colour depth"] = "Number of bits used to represent each pixel"
# Check to see entry
print(graphics)
```
## Exercise
1. Create a python file called dict.py
2. Create a dictionary called sound containing the following terms: analogue - continuously variable data, digital - data stored as bits, sample - measure of amplitude at a point in time
3. Print out the value of sample
4. Add the following two definitions to the dictionary: sampling rate - number of samples taken in a second, Sample resolution - number of bits per sample.
5. Loop through all the keys in the dictionary and print them out.
## Extension
Choose a different subject. Create a key terms dictionary with at least 5 items for that subject. Print out all the keys and values