Dictionaries are used to store data values in key-value pairs. A dictionary is a collection that is ordered, changeable, and does not allow duplicate keys. Dictionaries use curly brackets and have immutable keys paired with values that can be of any data type, including duplications. Dictionary keys are case sensitive and methods allow adding, deleting, and looping through key-value elements in the dictionary.

1. GE3151 – Problem Solving & Python
Programming UNIT IV
Dictionary

2. Dictionary
 Dictionaries are used to store data values in key:value
pairs.
 A dictionary is a collection which is ordered*,
changeable and does not allow duplicates.
 Dictionaries are written with curly brackets, and have
keys and values
 Values in a dictionary can be of any data type and can
be duplicated, whereas keys can’t be repeated and
must be immutable.
 Dictionary keys are case sensitive, the same name but
different cases of Key will be treated distinctly.

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6. Adding Elements to dictionary

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8. Deleting an element in Dictionary

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10. Dictionary Methods

11. Dictionary Methods

12. Loop through Dictionary

13. Loop through Dictionary