変数のデータ型と演算

ソースコード
    #coding:utf-8;
    #最初プロがラム:変数の変数型 (type)
    
    import os
    import math
    
    os.system("clear")
    os.system("pwd")
    # 数値 too 代入 ASSIGNMENT 
    a = 1;
    print(type(a),"a=",a);
    b = 2.23;
    print(type(b),"b=",b);
    c= a+b;
    
    # 文字と文字列
    a="h"
    print(type(a),"a=",a);
    a="h"
    print(type(a),"a=",a);
    a="hello world"
    print(type(a),"a=",a);
    a="1234254364"
    print(type(a),"a=",a);
    # 論理的なデータ ( 真 True, 偽false)
    a= 20;
    b =34;
    c= a==b;
    print(type(c),"c=",c);
    c= a>b;
    print(type(c),"c=",c);
    c= a>=b;
    print(type(c),"c=",c);
    c= a!=b;
    print(type(c),"c=",c);
    c= a>b;
    print(type(c),"c=",c);
    
    c= bool(1);
    print(type(c),"c=",c);
    c= bool(0);
    print(type(c),"c=",c);
    
    # 四則演算
    print(2*3+4*5)
    print(2*(3+4)*5/2)
    a,b,c=12,23,45
    print(a-b+c)
    a,b=100,23;
    a *=b;
    print(a)
    
    # 出力開数のフォーマットformat設定
    
    r=50
    # area=math.pi*r*r
    area=math.pi*math.pow(r,2)
    print(f"半径={r} 面積={area:.2f}")
    lenth= 2*math.pi*r
    print(f"半径={r} 周長={lenth:.2f}")
    
    
    # First product
    product_name = "りんご"
    apple_price = 190  
    tax_rate = 0.08
    qty = 5
    total_price = (1 + tax_rate) * apple_price * qty
    print(f"{product_name} {total_price:.0f} 円\n   単価 {apple_price}円 消費税 {tax_rate}購入個数 {qty}")
    
    # Second product
    product_name = "洗剤"
    detergent_price = 230 
    tax_rate = 0.10
    qty = 2
    total_price = (1 + tax_rate) * detergent_price * qty
    print(f"{product_name} {total_price:.0f} 円\n   単価 {detergent_price}円 消費税 {tax_rate} 購入個数 {qty}")
    
実行結果