In the previous video we mentioned how C was a strongly typed language. Imagine C as a grumpy old man who you owe a dollar bill to. Well, he wants his money now, but all you have is some change.
You look at your change, grab four quarters, and find out that it adds up to exactly a dollar. But unfortunately, you owe him a dollar bill, not just 100 cents. So yeah, he beats you over the head with his cane.