哪个R命令可显示R中的整个数据帧数据和结构？

# 创建一个示例数据框
df <- data.frame(
  name = c("Alice", "Bob", "Charlie"),
  age = c(25, 30, 35),
  gender = c("Female", "Male", "Male")
)

# 使用str()命令显示数据框的数据和结构
str(df)

'data.frame':   3 obs. of  3 variables:
 $ name  : Factor w/ 3 levels "Alice","Bob",..: 1 2 3
 $ age   : num  25 30 35
 $ gender: Factor w/ 2 levels "Female","Male": 1 2 2