520. 检测大写字母

检测大写字母

• 难度: easy
• 原始链接: https://leetcode.cn/problems/detect-capital
• 标签: 模拟

解法一: 模拟

go

func detectCapitalUse(word string) bool {
  n := len(word)
  // true：大写；false：小写
  fisrtUpper := word[0] <= 'Z'
  pre := false
  for i := 1; i < n; i++ {
    if i == 1 {
      pre = word[i] <= 'Z'
      continue
    }
    if pre != (word[i] <= 'Z') {
      return false
    }
  }
  return fisrtUpper || !fisrtUpper && !pre
}