Digital Decoding Hall - String to Integer (atoi)

📝 Input String

Current Index

Sign

State

Ready

Last Digit

Accumulated Number

🔮 atoi() Algorithm

            function
            atoi(s):
          
            // 1. Skip leading whitespace
          
            // 2. Read +/- sign
          
            // 3. Convert digits
          
            result = result * 10 + digit
          
            // 4. Handle overflow
          
            return sign * result

⚠️ Integer Limits (32-bit)

INT_MAX = 2,147,483,647

INT_MIN = -2,147,483,648

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