Negative numbers

Question

How would you express a negative number in coding

Answer 1

Just like -150. You can check like

if(num < 0) //negative number

Answer 2

Just like AJ #Learn With Me 👨‍💻 said.
You can Express negative numbers just like in maths.

If you want to know how negative numbers are represented as binary inside machine language, then read next.

The magnitude of the number is converted to 8bit binary, then its converted to 1's compliment, and then 2's compliment. Its a bit advanced concept.