String to Integer (atoi)

Implement myAtoi: skip leading whitespace, read an optional sign, parse digits until a non-digit, and clamp to the 32-bit signed range. String to Integer (atoi) Implement myAtoi: skip leading whitespace, read an optional sign, parse digits until a non-digit, and clamp to the 32-bit signed range. SWE string parsing state-machine medium Frequency Single report Last asked 2026-03-03 Stage phone-screen · onsite-coding String to Integer (atoi) Implement the myAtoi(string s) function, which converts a string to a 32-bit signed integer. The algorithm for myAtoi(string s) is as follows: Ignore any leading whitespace (" "). Check if the next character is '-' or '+'; read the sign if present. Read digits until the next character is non-digit or the end of the string. Convert the digits to an integer. If no digits were read, return 0. Clamp the value to the 32-bit signed range [-2^31, 2^31 - 1]. Examples Example 1: Input: s = "42" Output: 42 Example 2: Input: s = " -042" Output: -42 Explanation: Skip leading spaces, read sign, then parse digits until a non-digit appears. Example 3: Input: s = "1337c0d3" Output: 1337 Constraints 0 <= s.length <= 200 s consists of English letters, digits (0-9), space (' '), and symbols ('+', '-', '.'). The returned integer must be clamped to the 32-bit signed range.