Chapter04 조건문, 반복문

 

 

 

조건문¶

In [1]:

score = 95
# 97~100A+
# 94~96 A0
# 90~93 A-
if (score>=90) and (score<=100) :
    if (score>=97) and (score<=100) :
        print("A+")
    elif (score>=94) and (score<=96) :
        print("A0")
    elif (score>=90) and (score<=93) :
        print("A-")
    # else:   
    #     print("A-") 
elif (score>=80) and (score<90) :
    print("B")
else:   
    print("C")
    

 

A0

 

반복문¶

• for
• while
• do while XXX

In [2]:

for n in [1,2,3,4,5]:
        print(n)        

 

1
2
3
4
5

In [3]:

# range(<=시작번호, <끝번호, 증가)
print(   range(1, 6, 1)        )
print(   len(range(1, 6, 1))   )
print(   list(range(1, 6, 1))  )

print(   list(range(1, 6 ))  )
print(   list(range(6))  )

 

range(1, 6)
5
[1, 2, 3, 4, 5]
[1, 2, 3, 4, 5]
[0, 1, 2, 3, 4, 5]

In [4]:

a = 0
sum = 0
for n in range(1, 7, 1):
    print(n)
    a = a + 1
    sum = sum + n
print(sum)

 

1
2
3
4
5
6
21

In [ ]:

In [ ]:

In [5]:

x_list = ['111', '222']
y_list = ['y1', 'y2']

for x in ['111', '222']:
    print("-------", x)
    for y in ['y1', 'y2']:
        print(y)            

 

------- 111
y1
y2
------- 222
y1
y2

 

이중 for 문¶

• 구구단 출력

In [6]:

# 2 * 1 = 2   2 * 2 = 4 ....   2 * 9 = 18
# 3 * 1 = 3   3 * 2 = 6 ....   3 * 9 = 27
# ...
# 9 * 1 = 9   9 * 2 = 18 ....  9 * 9 = 81

In [7]:

# for dan in [2,3,4,5,6,7,8,9]:
#     for gob in [1,2,3,4,5,6,7,8,9]:        
for dan in range(2,10):
    for gob in range(1, 10):        
        print(dan, "*", gob, "=", dan*gob, end="\t")
    print("")

 

2 * 1 = 2	2 * 2 = 4	2 * 3 = 6	2 * 4 = 8	2 * 5 = 10	2 * 6 = 12	2 * 7 = 14	2 * 8 = 16	2 * 9 = 18	
3 * 1 = 3	3 * 2 = 6	3 * 3 = 9	3 * 4 = 12	3 * 5 = 15	3 * 6 = 18	3 * 7 = 21	3 * 8 = 24	3 * 9 = 27	
4 * 1 = 4	4 * 2 = 8	4 * 3 = 12	4 * 4 = 16	4 * 5 = 20	4 * 6 = 24	4 * 7 = 28	4 * 8 = 32	4 * 9 = 36	
5 * 1 = 5	5 * 2 = 10	5 * 3 = 15	5 * 4 = 20	5 * 5 = 25	5 * 6 = 30	5 * 7 = 35	5 * 8 = 40	5 * 9 = 45	
6 * 1 = 6	6 * 2 = 12	6 * 3 = 18	6 * 4 = 24	6 * 5 = 30	6 * 6 = 36	6 * 7 = 42	6 * 8 = 48	6 * 9 = 54	
7 * 1 = 7	7 * 2 = 14	7 * 3 = 21	7 * 4 = 28	7 * 5 = 35	7 * 6 = 42	7 * 7 = 49	7 * 8 = 56	7 * 9 = 63	
8 * 1 = 8	8 * 2 = 16	8 * 3 = 24	8 * 4 = 32	8 * 5 = 40	8 * 6 = 48	8 * 7 = 56	8 * 8 = 64	8 * 9 = 72	
9 * 1 = 9	9 * 2 = 18	9 * 3 = 27	9 * 4 = 36	9 * 5 = 45	9 * 6 = 54	9 * 7 = 63	9 * 8 = 72	9 * 9 = 81	

 

for + list¶

In [8]:

num_list = ["a","b","c","d"]
for i, n in enumerate(num_list):
    print(n,  i, num_list[i])

 

a 0 a
b 1 b
c 2 c
d 3 d

In [9]:

num_list = ["a","b","c","d"]
for i in range(0,4):  #0 1 2 3
    print(i,  num_list[i])

 

0 a
1 b
2 c
3 d

In [ ]: