String to Integer (atoi)

medium

Acceptance: 41%

Strings

Write a function that parses a string and extracts an integer from it, mimicking simplified integer-parsing behavior. The function should skip leading whitespace, recognize an optional '+' or '-' sign, then read consecutive digit characters. Convert the resulting digit sequence to an integer. If the value exceeds the 32-bit signed integer range [-2^31, 2^31 - 1], clamp it to the nearest boundary.

Examples

Example 1:

Input:s = " 123"

Output:123

Explanation: Leading spaces are ignored and the digits '123' are parsed as the integer 123.

Example 2:

Input:s = "-98abc"

Output:-98

Explanation: After the sign '-', digits '98' are consumed. Parsing stops at the non-digit character 'a'.

Hints

1234567

import java.util.*;

public class Main {
    public static void main(String[] args) {
        // Write your solution here
    }
}

import java.util.*;

public class Main {
    public static void main(String[] args) {
        // Write your solution here
    }
}

String to Integer (atoi)

Examples

Hints

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