Binary to Decimal conversion
Detailed guide and Python implementation for the 'Binary to Decimal conversion' problem.
Problem Statement
Write a function binary_to_decimal(binary_str) that takes a string representing a binary number (containing only '0' and '1') and returns its decimal (base-10) integer equivalent.
Each digit in a binary number represents a power of 2, starting from the rightmost digit (2^0). For example, binary '1010' = 1×2³ + 0×2² + 1×2¹ + 0×2⁰ = 8 + 0 + 2 + 0 = 10.
- •1 <= len(binary_str) <= 20
- •binary_str contains only '0' and '1'
Examples
binary_to_decimal('1010')10
1×2³ + 0×2² + 1×2¹ + 0×2⁰ = 8 + 0 + 2 + 0 = 10.
binary_to_decimal('1111')15
1×2³ + 1×2² + 1×2¹ + 1×2⁰ = 8 + 4 + 2 + 1 = 15.
binary_to_decimal('10000')16
1×2⁴ = 16.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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