Easy-to-learn Python operator notes with examples:
1. Arithmetic Operators:
- Addition (+): Adds two numbers.
- Subtraction (-): Subtracts the second number from the first.
- Multiplication (*): Multiplies two numbers.
- Division (/): Divides the first number by the second.
- Modulus (%): Returns the remainder after division.
- Exponentiation (**): Raises the first number to the power of the second.
Example:
```python
a = 10
b = 3
print(a + b) # Output: 13
print(a - b) # Output: 7
print(a * b) # Output: 30
print(a / b) # Output: 3.333...
print(a % b) # Output: 1
print(a ** b) # Output: 1000
```
2. Assignment Operators:
- Equals (=): Assigns the value on the right to the variable on the left.
- Add and Assign (+=): Adds the right value to the variable and assigns the result.
- Subtract and Assign (-=): Subtracts the right value from the variable and assigns the result.
- Multiply and Assign (*=): Multiplies the variable by the right value and assigns the result.
- Divide and Assign (/=): Divides the variable by the right value and assigns the result.
- Modulus and Assign (%=): Performs modulus operation on the variable and assigns the result.
Example:
```python
x = 5
x += 2 # Equivalent to x = x + 2
print(x) # Output: 7
y = 10
y -= 3 # Equivalent to y = y - 3
print(y) # Output: 7
```
3. Comparison Operators:
- Equal to (==): Checks if two values are equal.
- Not equal to (!=): Checks if two values are not equal.
- Greater than (>): Checks if the left value is greater than the right value.
- Less than (<): Checks if the left value is less than the right value.
- Greater than or equal to (>=): Checks if the left value is greater than or equal to the right value.
- Less than or equal to (<=): Checks if the left value is less than or equal to the right value.
Example:
```python
a = 5
b = 7
print(a == b) # Output: False
print(a != b) # Output: True
print(a > b) # Output: False
print(a < b) # Output: True
```
4. Logical Operators:
- and: Returns True if both operands are True.
- or: Returns True if at least one operand is True.
- not: Returns True if the operand is False, and vice versa.
Example:
```python
x = 5
y = 10
print(x > 0 and y < 15) # Output: True
print(x > 7 or y < 8) # Output: False
print(not x > 0) # Output: False
```
5. Identity Operators:
- is: Returns True if both variables refer to the same object.
- is not: Returns True if both variables do not refer to the same object.
Example:
```python
p = [1, 2, 3]
q = p
r = [1, 2, 3]
print(p is q) # Output: True
print(p is r) # Output: False
print(p is not r) # Output: True
```
6. Membership Operators:
- in: Returns True if a value is present in a sequence.
- not in: Returns True if a value is not present in a sequence.
Example:
```python
list_numbers = [1, 2, 3, 4, 5]
print(3 in list_numbers) # Output: True
print(6 not in list_numbers) # Output: True
```
I hope these notes and examples are helpful for your Python tutorial blog! Happy coding and blogging!
