How can test a variable if it is an integer?

Question

As the title might specify, I want to ask how can I test a variable if it is an integer. I have seen other topics and they don't seem to have code that works or that I know how to use.

print("Enter the weight of the bag in grams.")

weight = float(input()) # float was used as it might be a decimal sometimes

amtcoin = weight / 3.56

How do I test if amtcoin is a integer? As the variable suggests, it is the amount of coins and you cannot have a fraction of a coin. Thanks.

Answer 1

您可以像is_integer一样转换为float，然后使用is_integer方法进行检查：

float(weight).is_integer()

Answer 2

amtcoin variable is instance of class you declare it. Declare it as float and if you want to know if it's a fraction or not check amtcoin % 1 == 0

Answer 3

Try something like this:

if int(amtcoin) == amtcoin:
    do_something()

If it is int , this condition will be met.