Let's now take a look at how global variables can help us save information between different function calls.
Imagine you're writing a program for a video game: you need to calculate the damage that the main hero deals to enemies in one hit. The current damage is stored in the global variable hero_damage. Use this global variable to write three functions that change its value:
double_damage(): doubles the hero's damagedisarmed(): reduces the damage to 10% of its current valuepower_potion(): adds 100 damage points
The functions are already declared. You only need to replace the pass keyword with your own code.
Don't output or return anything; just write the body of the functions. Remember how to modify the value of a global variable within a function.
