Here is basic text added quickly using the paragraph block.

Now content added using the classic editor. This text is bold and in red. Now I am adding a hyperlink:

And now I am adding a shortcode advanced iframe. [advanced_iframe src=”” width=”100%” height=”600″]

And now I am adding the shortcode for advanced frame using the shortcode plugin:

[advanced_iframe src=”” width=”100%” height=”600″]

def is_prime(n):
    if n < 2:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True

number = int(input("Enter a number: "))
if is_prime(number):
    print(number, "is a prime number.")
    print(number, "is not a prime number.")

[advanced_iframe src="//" width="100%" height="600"]

Adding a few lines of text here