In Python, operators are symbols or special characters that perform various operations on operands (variables, values). Python supports a wide range of operators, including arithmetic, comparison, logical, assignment, bitwise, and more. Let's go through some of the commonly used operators with examples:
1. Arithmetic Operators:
- Addition (+): Adds two operands.
```python
a = 5
b = 3
result = a + b
print(result) # Output: 8
```
- Subtraction (-): Subtracts the right operand from the left operand.
```python
a = 5
b = 3
result = a - b
print(result) # Output: 2
```
- Multiplication (*): Multiplies two operands.
```python
a = 5
b = 3
result = a * b
print(result) # Output: 15
```
- Division (/): Divides the left operand by the right operand, returning a floating-point result.
```python
a = 5
b = 3
result = a / b
print(result) # Output: 1.6666666666666667
```
- Floor Division (//): Divides the left operand by the right operand, returning the largest integer that is less than or equal to the result.
```python
a = 5
b = 3
result = a // b
print(result) # Output: 1
```
- Modulus (%): Returns the remainder when the left operand is divided by the right operand.
```python
a = 5
b = 3
result = a % b
print(result) # Output: 2
```
- Exponentiation (**): Raises the left operand to the power of the right operand.
```python
a = 2
b = 3
result = a ** b
print(result) # Output: 8
```
2. Comparison Operators:
- Equal to (==): Checks if two operands are equal.
```python
x = 5
y = 5
result = x == y
print(result) # Output: True
```
- Not equal to (!=): Checks if two operands are not equal.
```python
x = 5
y = 3
result = x != y
print(result) # Output: True
```
- Greater than (>): Checks if the left operand is greater than the right operand.
```python
x = 5
y = 3
result = x > y
print(result) # Output: True
```
- Less than (<): Checks if the left operand is less than the right operand.
```python
x = 5
y = 3
result = x < y
print(result) # Output: False
```
- Greater than or equal to (>=): Checks if the left operand is greater than or equal to the right operand.
```python
x = 5
y = 3
result = x >= y
print(result) # Output: True
```
- Less than or equal to (<=): Checks if the left operand is less than or equal to the right operand.
```python
x = 5
y = 3
result = x <= y
print(result) # Output: False
```
3. Logical Operators:
- Logical AND (and): Returns True if both operands are True.
```python
x = True
y = False
result = x and y
print(result) # Output: False
```
- Logical OR (or): Returns True if at least one operand is True.
```python
x = True
y = False
result = x or y
print(result) # Output: True
```
- Logical NOT (not): Returns the opposite of the operand's value.
```python
x = True
result = not x
print(result) # Output: False
```
4. Assignment Operators:
- Assignment (=): Assigns the value of the right operand to the left operand.
```python
x = 5
```
- Addition Assignment (+=): Adds the right operand to the left operand and assigns the result to the left operand.
```python
x = 5
x += 3 # Equivalent to x = x + 3
print(x) # Output: 8
```
The above pattern applies to other arithmetic operators as well, such as `-=`, `*=`, `/=`, `//=`, `%=`, `**=`, etc.
5. Bitwise Operators:
- Bitwise AND (&): Performs a bitwise AND operation on the binary representations of the operands.
```python
x = 5 # Binary representation: 101
y = 3 # Binary representation: 011
result = x & y
print(result) # Output: 1 (Binary representation: 001)
```
- Bitwise OR (|): Performs a bitwise OR operation on the binary representations of the operands.
```python
x = 5 # Binary representation: 101
y = 3 # Binary representation: 011
result = x | y
print(result) # Output: 7 (Binary representation: 111)
```
- Bitwise XOR (^): Performs a bitwise XOR operation on the binary representations of the operands.
```python
x = 5 # Binary representation: 101
y = 3 # Binary representation: 011
result = x ^ y
print(result) # Output: 6 (Binary representation: 110)
```
- Bitwise NOT (~): Performs a bitwise NOT operation, which inverts the bits of the operand.
```python
x = 5 # Binary representation: 0000 0000 0000 0101 (assuming 32-bit)
result = ~x
print(result) # Output: -6 (Binary representation: 1111 1111 1111 1010)
```
- Bitwise Left Shift (<<): Shifts the bits of the left operand to the left by the number of positions specified in the right operand.
```python
x = 5 # Binary representation: 0000 0000 0000 0101 (assuming 32-bit)
result = x << 2
print(result) # Output: 20 (Binary representation: 0000 0000 0001 0100)
```
- Bitwise Right Shift (>>): Shifts the bits of the left operand to the right by the number of positions specified in the right operand.
```
python
x = 5 # Binary representation: 0000 0000 0000 0101 (assuming 32-bit)
result = x >> 1
print(result) # Output: 2 (Binary representation: 0000 0000 0000 0010)
```
These are some of the commonly used operators in Python. Understanding how to use these operators is essential for performing various calculations, comparisons, and logical operations in Python programs.
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