# はコメント
print ("hello, world!") # お約束

# スクリプトファイルの漢字コードはUTF-8
print ("ハロー, ワールド!")

>001_sample.py
hello, world!
ハロー, ワールド!

int_a = 100  # 整数
print ("int_a =",int_a) # printは「,」で連接できる

dbl_b = 123.456  # 倍精度浮動小数点
print ("dbl_b =",dbl_b)

str_c = "Yesterday, I have enjoyed"  # 文字列1
str_d = "long jogging."              # 文字列2
print (str_c, str_d)

>002_sample.py
int_a = 100
dbl_b = 123.456
Yesterday, I have enjoyed long jogging.

• 二項演算子

  演算子	機能
  A // B	除算の小数点以下切り捨て(2.5なら2, -3.5なら-4)
  A % B	剰余
  A ** B	べき乗



• 比較演算子: Bool値で戻る

演算子	機能
A == B	EQUAL: AとBが等しければTrue。文字列にも適用できる。
A != B	NOT EQUAL: AとBが等しくなければTrue。文字列にも適用できる。



• 論理/Bool演算子: Bool値で戻る

演算子	機能
A and B	AND: AとBの両方がTrueならTrue
A or B	OR: A又はBがTrueならTrue
not A	NOT: AのBool値反転



• Bool変数: True/Falseを格納する変数型もある

bool_flag_a = False
bool_flag_b = True

print ("bool_flag_a =",bool_flag_a)
print ("bool_flag_b =",bool_flag_b)
print ("flag_a and flag_b =",bool_flag_a and bool_flag_b)
print ("flag_a or flag_b =",bool_flag_a or bool_flag_b)

>003_sample.py
bool_flag_a = False
bool_flag_b = True
flag_a and flag_b = False
flag_a or flag_b = True

int_a = 80
print ("---- int_a =",int_a,"----")
if int_a > 100:
    print ("(1)100より大きい:",int_a)
elif (int_a <= 100) and (int_a >= 50):  # <== ここ
    print ("(2)100以下50以上:",int_a)
else:
    print ("(3)50未満:",int_a)

int_b = 200
print ("---- int_b =",int_b,"----")
if int_b > 100: # <========================== ここ
    print ("(1)100より大きい:",int_b)
elif (int_b <= 100) and (int_b >= 50):
    print ("(2)100以下50以上:",int_b)
else:
    print ("(3)50未満:",int_b)

int_c = 30
print ("---- int_b =",int_c,"----")
if int_c > 100:
    print ("(1)100より大きい:",int_c)
elif (int_c <= 100) and (int_c >= 50):
    print ("(2)100以下50以上:",int_c)
else:    # <================================= ここ
    print ("(3)50未満:",int_c)

>004_sample.py
---- int_a = 80 ----
(2)100以下50以上: 80
---- int_b = 200 ----
(1)100より大きい: 200
---- int_b = 30 ----
(3)50未満: 30

list_a = [0,1,2,"3:文字列",4]

print ("All =",list_a)
print ("[0] =",list_a[0])
print ("[1] =",list_a[1])
print ("[2] =",list_a[2])
print ("[3] =",list_a[3])
print ("[4] =",list_a[4])

>005_sample.py
All = [0, 1, 2, '3:文字列', 4]
[0] = 0
[1] = 1
[2] = 2
[3] = 3:文字列
[4] = 4

list_int_a = [0,20,40,80,160]

for int_a in list_int_a: # listオブジェクトのiteratorでループ回数決まる
    if int_a > 100:
        print ("100 <",int_a)
    elif (int_a <= 100) and (int_a > 30):
        print ("100>=",int_a,"> 30")
    else:
        print (" 30>=",int_a)

>006_sample.py
 30>= 0
 30>= 20
100>= 40 > 30
100>= 80 > 30
100 < 160

list_int_a = [0,50,100,200,400]

for i in range(4): # range関数で[0,1,2,3]の「リスト」を渡している
    if list_int_a[i] > 100:
        print ("100 <",list_int_a[i])
    elif (list_int_a[i] <= 100) and (list_int_a[i] > 30):
        print ("100>=",list_int_a[i],"> 30")
    else:
        print (" 30>=",list_int_a[i])

>007_sample.py
 30>= 0
100>= 50 > 30
100>= 100 > 30
100 < 200

list_int_a = [0,50,100,200,400]
i = 0

while i < 3:
    if list_int_a[i] > 100:
        print ("100 <",list_int_a[i])
    elif (list_int_a[i] <= 100) and (list_int_a[i] > 30):
        print ("100>=",list_int_a[i],"> 30")
    else:
        print (" 30>=",list_int_a[i])
    
    i = i + 1

>008_sample.py
 30>= 0
100>= 50 > 30
100>= 100 > 30

list_int_a = [0,50,100,200,400]

for int_a in list_int_a:
    if int_a == 100:
        print ("100 is found !!")
        break
    else:
        print (int_a, "is not 100 ...")

>009_sample.py
0 is not 100 ...
50 is not 100 ...
100 is found !!