#1812Medium· asked at 15 companies
String to Integer (atoi)
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What we know
Example 1
Input: s = "42" Output: 42
Example 2
Input: s = " -042" Output: -42
Whitespace is skipped, the sign is read, leading zeros are dropped.
Example 3
Input: s = "1337c0d3" Output: 1337
Reading stops at the first non-digit.
Constraints
- •
0 <= s.length <= 200 - •
sconsists of English letters, digits, ' ', '+', '-', and '.'.