如何检查隐式或显式转换是否存在？

a = 5
b = 3.0

if isinstance(a, int) and isinstance(b, float):
    print("隐式转换存在")
else:
    print("隐式转换不存在")

a = 5
b = float(a)

if type(a) == int and type(b) == float:
    print("显式转换存在")
else:
    print("显式转换不存在")

int a = 5;
double b = 3.0;

if (a instanceof Integer && b instanceof Double) {
    System.out.println("隐式转换存在");
} else {
    System.out.println("隐式转换不存在");
}

float c = (float) a;
if (c instanceof Float) {
    System.out.println("显式转换存在");
} else {
    System.out.println("显式转换不存在");
}

let a = 5;
let b = 3.0;

if (typeof a === 'number' && typeof b === 'number') {
    console.log("隐式转换存在");
} else {
    console.log("隐式转换不存在");
}

let c = a * 1.0;
if (typeof c === 'number') {
    console.log("显式转换存在");
} else {
    console.log("显式转换不存在");
}