2.2 🧠 Type Conversion in Python

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Back 2.2 🧠 Type Conversion in Python 19 Jun, 2025

ABHISHEK AGNIHOTRI

Type conversion means changing the data type of a value from one type to another. Python supports two types of conversions:

🔄 1. Implicit Type Conversion (Automatic)

Python automatically converts a smaller data type to a larger data type.

a = 5       # int
b = 2.0     # float
c = a + b   # Result: 7.0 (float)
print(type(c))  # Output: <class 'float'>

🔧 2. Explicit Type Conversion (Type Casting)

Done manually using built-in functions.

🔢 Numeric Conversion

Function	Converts To	Example
`int()`	Integer	`int("10")` → `10`
`float()`	Floating-point	`float("5")` → `5.0`
`complex()`	Complex number	`complex("2+3j")` → `2+3j`

🔤 String & Others

Function	Converts To	Example
`str()`	String	`str(100)` → `"100"`
`list()`	List	`list("abc")` → `['a','b','c']`
`tuple()`	Tuple	`tuple([1, 2])` → `(1, 2)`
`set()`	Set	`set([1, 1, 2])` → `{1, 2}`
`dict()`	Dictionary	`dict([(1,'a'), (2,'b')])`

⚠️ Important Notes

Not all conversions are allowed. E.g. int("abc") throws an error.
Use type() to check a variable's current data type.