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Neural Networks from Scratch
Last Updated: December 11, 2025
Ashish Pratap Singh
6 min read
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On this page
What We're Building
The Math You Need
Step 1: Setting Up
Step 2: One-Hot Encoding Labels
Step 3: Activation Functions
Step 4: Initialize Weights
Step 5: Forward Propagation
Step 6: Loss Function
Step 7: Backpropagation
Step 8: Update Weights
Step 9: Putting It All Together
Step 10: Train the Network
Testing on Individual Digits
What Just Happened?
Key Takeaways
Taking It Further
Complete Code
References
Summary
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