diff --git a/1.py b/1.py
new file mode 100644
index 0000000..07c2f06
--- /dev/null
+++ b/1.py
@@ -0,0 +1,65 @@
+import random
+import time
+#import pandas as pd
+#import numpy as np
+
+
+book_list = [["어린왕자","생텍쥐페리","열린책들","20210321"],
+["미적분학","제임스","경문사","20190429"]]
+#set_book_list = set(book_list)
+
+def enrollment_book():  # 책 등록 함수
+    print("추가할 도서의 정보를 입력하세요: ")
+    title=input("제목: ")
+    author=input("저자:")
+    company=input("출판사: ")
+    date=input("입고일: ")
+
+    book_list.append([title,author,company,date])
+    print(book_list)
+
+      
+
+def delete_book():  # 책 삭제 함수
+    dele=0
+    cnt=1
+
+    for i in range(len(book_list)):
+        print(("%d."+str(book_list[i]))%cnt)
+        cnt+=1
+
+    dele=int(input("삭제할 도서정보의 번호를 입력하세요: "))
+    book_list.pop(dele-1)
+    print("삭제완료")    
+
+
+while True:
+    print("\n--------------\n")
+    print("1. 책 등록")
+    print("2. 책 삭제")
+    print("3. 책 목록")
+    print("4. 책 추천")
+    print("5. 종료")
+    print("\n--------------\n")
+    menu_num = input("메뉴 선택: ")
+    print("\n--------------\n")
+
+    if menu_num == "1":
+        enrollment_book()     
+
+    elif menu_num == "2":
+        delete_book()
+
+    elif menu_num == "3":
+        cnt=1
+        for i in range(len(book_list)):
+            print(("%d."+str(book_list[i]))%cnt)
+            cnt+=1
+        #df=pd.DataFrame(book_list,columns=['제목','저자','출판사','입고일'])
+        #print(df)    
+    elif menu_num == "4":
+        print(random.choice(book_list))
+    elif menu_num == "5":
+        break
+    else:
+        print("잘못된 입력입니다.")
\ No newline at end of file
diff --git a/2.py b/2.py
new file mode 100644
index 0000000..f7e6939
--- /dev/null
+++ b/2.py
@@ -0,0 +1,36 @@
+order={"Num": "101", "Buger":"치즈버거","Beverage":"콜라"}
+
+print("\n--------------\n")
+print("현재 주문내역")    
+print("\n--------------\n")
+for key, value in order.items():
+    print(key,":",value)   
+
+print("\n--------------\n")
+print("주문 수정사항")
+print("\n--------------\n")
+order["Buger"]="더블치즈버거"
+order["사이드메뉴"]="치킨너겟"
+
+for key, value in order.items():
+    print(key,":",value) 
+
+print("\n--------------\n")
+print("주문서에 내역 삭제")
+print("\n--------------\n")
+order.clear()
+
+print("\n--------------\n")
+print("새로운 주문")
+print("\n--------------\n")
+order1={"주문번호":"102", "버거":"불고기버거세트", "음료":"바닐라쉐이크"}
+order2={"주문번호":"103", "버거":"치킨버거", "음료":"딸기칠러", "사이드":"치즈스틱"}
+
+for key, value in order1.items():
+    print(key,":",value) 
+print("\n")
+
+for key, value in order2.items():
+    print(key,":",value) 
+print("\n")
+
diff --git a/3.py b/3.py
new file mode 100644
index 0000000..9eeed54
--- /dev/null
+++ b/3.py
@@ -0,0 +1,19 @@
+for l in range(1,10):
+    print("*****", end="\t")
+print(" ")
+
+for m in range(1,10):
+    print(" %d단 "%(10-m),end="\t")
+print(" ")
+
+for n in range(1,10):
+    print("*****",end="\t")
+print(" ")
+
+for b in range(1,10):
+    for a in range(2,11):
+        c=11-a
+        d=10-b
+        print("%d*%d=%d" %(c,d,c*d), end="\t")
+    print(" ")    
+