如何编写if/else语句来检查变量的类型

if isinstance(variable, int):
    print("变量是整数类型")
elif isinstance(variable, str):
    print("变量是字符串类型")
elif isinstance(variable, float):
    print("变量是浮点数类型")
elif isinstance(variable, bool):
    print("变量是布尔类型")
else:
    print("变量的类型未知")

if (typeof variable === 'number') {
    console.log("变量是数字类型");
} else if (typeof variable === 'string') {
    console.log("变量是字符串类型");
} else if (typeof variable === 'boolean') {
    console.log("变量是布尔类型");
} else {
    console.log("变量的类型未知");
}

if (variable instanceof Integer) {
    System.out.println("变量是整数类型");
} else if (variable instanceof String) {
    System.out.println("变量是字符串类型");
} else if (variable instanceof Double) {
    System.out.println("变量是浮点数类型");
} else if (variable instanceof Boolean) {
    System.out.println("变量是布尔类型");
} else {
    System.out.println("变量的类型未知");
}

if (variable is int) {
    Console.WriteLine("变量是整数类型");
} else if (variable is string) {
    Console.WriteLine("变量是字符串类型");
} else if (variable is double) {
    Console.WriteLine("变量是浮点数类型");
} else if (variable is bool) {
    Console.WriteLine("变量是布尔类型");
} else {
    Console.WriteLine("变量的类型未知");
}