NumPy — Get Started

First NumPy program

import numpy as np

# Create array
arr = np.array([1, 2, 3, 4, 5])
print(arr)
print(type(arr))

# Basic operations
print(arr + 10)  # Add 10 to each element
print(arr * 2)   # Multiply each element by 2
print(np.sqrt(arr))  # Square root

Array operations

arr = np.array([1, 2, 3, 4, 5])

print(f"Sum: {arr.sum()}")
print(f"Mean: {arr.mean()}")
print(f"Std: {arr.std()}")
print(f"Min: {arr.min()}")
print(f"Max: {arr.max()}")

2D arrays

arr_2d = np.array([[1, 2, 3], [4, 5, 6]])
print(arr_2d)
print(f"Shape: {arr_2d.shape}")
print(f"Size: {arr_2d.size}")

Slicing

arr = np.array([10, 20, 30, 40, 50])
print(arr[1:4])  # [20, 30, 40]
print(arr[::2])  # [10, 30, 50]

Mini Practice

1. Create arrays
2. Perform operations
3. Use 2D arrays
4. Practice slicing

Up Next

Continue with Installation - Setting up NumPy.