Casting, also known as type conversion, is the process of changing the data type of a variable from one type to another. Python provides several built-in functions for casting variables to different types.
1. Casting to Integer:
- Use the `int()` function to convert a variable to an integer.
- Example: `num = int(3.14)` will convert the float value 3.14 to an integer, resulting in `num` being equal to 3.
2. Casting to Float:
- Use the `float()` function to convert a variable to a float.
- Example: `pi = float(3)` will convert the integer value 3 to a float, resulting in `pi` being equal to 3.0.
3. Casting to String:
- Use the `str()` function to convert a variable to a string.
- Example: `age = 25` followed by `age_str = str(age)` will convert the integer value 25 to a string, resulting in `age_str` being equal to "25".
Now, let's move on to some exercises and questions to reinforce your understanding:
Exercise 1:
Convert the variable `x` from an integer to a float and print its value.
```python
x = 10
x = float(x)
print(x)
```
Exercise 2:
Convert the variable `y` from a float to an integer and print its value.
```python
y = 3.5
y = int(y)
print(y)
```
Exercise 3:
Convert the variable `z` from an integer to a string and print its value.
```python
z = 7
z = str(z)
print(z)
```
Now, let's test your knowledge with a few questions:
Question 1:
What is the result of the following code snippet?
```python
a = 5
b = float(a)
print(b)
```
A) 5.0
B) "5"
C) 5
D) Error
Question 2:
What will be the output of the code below?
```python
c = 3.14
c = str(c)
print(type(c))
```
A) float
B) integer
C) string
D) Error
Question 3:
What is the value of `d` after executing the following code?
```python
d = int("10") + float("3.5")
```
A) 13.5
B) 13
C) "13.5"
D) Error
Answers:
Exercise 1: The output will be 10.0.
Exercise 2: The output will be 3.
Exercise 3: The output will be "7".
Question 1: A) 5.0.
Question 2: C) string.
Question 3: A) 13.5.
I hope this helps! Let me know if you have any further questions.
