Introductory Python Modules and conditional expressions

Introduction

You learned about conditional expressions using Python if statements. This is the study record!

Overview

I'm learning Python. I learned the basic conditional expression by reproducing the "competition situation of RPG game", so I added an arrangement and summarized it.

content of study

Getting Started with Python Conditional expression Variables and data types random module

Completion code

#Reproduce the attack situation of RPG

#Fighting monsters.
#Roll 1 to 10 dice,
#If it is less than 6, it is displayed that only the dice have been damaged.
#If it is 6 or more, it is displayed as a critical hit and 100 damage is done.
#If it is 0, 0 damage is displayed as protected.

import random
hit = random.randint(0,10)
if 1 <= hit < 6:
    print("To slime" + str(hit) + "Damaged!")
elif hit >= 6:
    print("Inflicted 100 critical hit damage")
else:
    print("The damage is" + str(hit) + "Defended")

Code description

Let's check the code one by one. import

import random
hit = random.randint(0,10)

Import means to incorporate.

import random

In this case, you have included the random module.

random module

A module is a part for designing programming. In Python, it seems that programs are created by combining these modules.

The random module used this time contains "random function", "randint function", etc.

• random function ・ ・ ・ Returns a random number between 0 and 1.
• randint function: Returns a random integer value within the specified argument range.

When using the random module, use it with "random.function name ()".

Example) random.random () 　 random.randint()

hit = random.randint(0,10)

Therefore, in this code, a number is randomly assigned to the variable called hit from the values 0 to 10 specified by the randint function.

if statement (conditional expression)

if 1 <= hit < 6:
    print("To monsters" + str(hit) + "Damaged!")
elif hit >= 6:
    print("Inflicted 100 critical hit damage on monsters")
else:
    print("The damage is" + str(hit) + "Defended")

The following code is a conditional expression. First, let's check how to write a conditional branch using a basic if statement.

Conditional branch by if statement

Here is how to write a conditional branch with a basic if statement.

number = 1
① if conditional expression 1:
    print( "OK！")  #Processing when conditional expression 1 is satisfied
② elif conditional expression 2:
    print( "Neither")  #Processing when conditional expression 2 is satisfied
③else:
    print( "NG！")  #Processing when none of the conditional expressions are satisfied

In this conditional expression,

Processing is performed on the condition that the value from 0 to 10 specified by the randint function assigned to hit is used.

I will apply it.

① [Conditional expression 1]

if 1 <= hit < 6:

• When the assigned hit value is "1 or more and 6 or less"

→ print ("Damage to monster" + str (hit) + "!")

Processing is executed.

② [Conditional expression 2]

elif hit >= 6:

• When the assigned hit value is "6 or more"

→ print ("Critical hit damage 100 was given to the monster")

Processing is executed.

③ [Neither conditional expression 1 nor conditional expression 2 holds]

else:

• In this case, the assigned hit value is "0".

print("The damage is" + str(hit) + "Defended")

Processing is executed.

Summary

that's all.

Conditional branching is performed according to the randomly generated value, and the process is executed.

I tried to reproduce the series of flow as "competition situation of RPG game".

import random
hit = random.randint(0,10)
if 1 <= hit < 6:
    print("To slime" + str(hit) + "Damaged!")
elif hit >= 6:
    print("Inflicted 100 critical hit damage")
else:
    print("The damage is" + str(hit) + "Defended")

reference

random module https://docs.python.org/ja/3/library/random.html