test38@hwsrv-307897:~$
test38@hwsrv-307897:~$ PS1="\u\$ "
test38$ alias ll='ls -l'
test38$ ll
total 56
drwxrwxr-x 2 test38 someguests 4096 Jan 22 00:16 ./
drwxrwxr-x 6 test38 someguests 4096 Jan 21 22:36 ../
-rw-rw-r-- 1 test38 someguests   37 Jan 22 00:04 991.py
-rw-rw-r-- 1 test38 someguests   56 Jan 22 00:06 992.py
-rw-rw-r-- 1 test38 someguests  248 Jan 22 00:08 995.py
-rw-rw-r-- 1 test38 someguests  127 Jan 22 00:10 996.py
-rw-rw-r-- 1 test38 someguests   98 Jan 22 00:11 997.py
-rw-rw-r-- 1 test38 someguests  148 Jan 21 23:09 998.py
-rw-rw-r-- 1 test38 someguests  101 Jan 21 22:47 999.py
-rw-rw-r-- 1 test38 someguests  117 Jan 21 22:59 99a.py
-rw-rw-r-- 1 test38 someguests  116 Jan 21 22:50 99b.py
-rw-rw-r-- 1 test38 someguests  177 Jan 21 23:01 99c.py
-rw-rw-r-- 1 test38 someguests  164 Jan 21 23:03 99d.py
-rw-rw-r-- 1 test38 someguests  106 Jan 21 23:08 99x.py
test38$ cat 991.py

for i in range(1, 10):
    print(i)
test38$ python3 991
python3: can't open file '991': [Errno 2] No such file or directory
test38$ python3 991.py
1
2
3
4
5
6
7
8
9
test38$ cat 992.py

for i in range(1, 10):
    print(i, end=" ")
print( );
test38$ python3 992.py
1 2 3 4 5 6 7 8 9
test38$ cat 993
cat: 993: No such file or directory
test38$ cat 995.py

i=2
for j in range(1, 10):
    print(j*i, end=" ")
print( );

i=3
for j in range(1, 10):
    print(j*i, end=" ")
print( );

i=4
for j in range(1, 10):
    print(j*i, end=" ")
print( );

i=5
for j in range(1, 10):
    print(j*i, end=" ")
print( );

test38$ python3 995.py
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
test38$
test38$ cat 996.py

for i in range(2, 7):    # 2, 3, 4, 5, 6   (Note not include 7)
  for j in range(1, 10):
    print(j*i, end=" ")
  print( );

test38$ python3 996.py
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
test38$
test38$ cat 997.py

for i in range(1, 10):    #   1..9
  for j in range(1, 10):
    print(j*i, end=" ")
  print( );

test38$ python3 997.py
1 2 3 4 5 6 7 8 9
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
7 14 21 28 35 42 49 56 63
8 16 24 32 40 48 56 64 72
9 18 27 36 45 54 63 72 81
test38$

test38$ cat 998.py
for i in range(1, 10):
    for j in range(1, 10):
        if( i*j < 10): print(" ", end="")
        print(" {} ".format( i*j) , end="")
    print()
test38$ python3 998.py
  1   2   3   4   5   6   7   8   9
  2   4   6   8  10  12  14  16  18
  3   6   9  12  15  18  21  24  27
  4   8  12  16  20  24  28  32  36
  5  10  15  20  25  30  35  40  45
  6  12  18  24  30  36  42  48  54
  7  14  21  28  35  42  49  56  63
  8  16  24  32  40  48  56  64  72
  9  18  27  36  45  54  63  72  81
test38$
test38$ cat 999.py
for i in range(1, 10):
    for j in range(1, 10):
        print(" %2d" % (i*j), end=" ")
    print()
test38$ python3 999.py
  1   2   3   4   5   6   7   8   9
  2   4   6   8  10  12  14  16  18
  3   6   9  12  15  18  21  24  27
  4   8  12  16  20  24  28  32  36
  5  10  15  20  25  30  35  40  45
  6  12  18  24  30  36  42  48  54
  7  14  21  28  35  42  49  56  63
  8  16  24  32  40  48  56  64  72
  9  18  27  36  45  54  63  72  81
test38$

test38$ cat 99a.py
for i in range(1, 10):
    for j in range(1, i+1):
        print('{}x{}={}\t'.format(j, i, i*j), end='')
    print()
test38$ python3 99a.py
1x1=1
1x2=2   2x2=4
1x3=3   2x3=6   3x3=9
1x4=4   2x4=8   3x4=12  4x4=16
1x5=5   2x5=10  3x5=15  4x5=20  5x5=25
1x6=6   2x6=12  3x6=18  4x6=24  5x6=30  6x6=36
1x7=7   2x7=14  3x7=21  4x7=28  5x7=35  6x7=42  7x7=49
1x8=8   2x8=16  3x8=24  4x8=32  5x8=40  6x8=48  7x8=56  8x8=64
1x9=9   2x9=18  3x9=27  4x9=36  5x9=45  6x9=54  7x9=63  8x9=72  9x9=81
test38$ cat 99b.py
for i in range(1, 10):
    for j in range(i, 10):
        print('{}x{}={}\t'.format(j, i, i*j), end='')
    print()
test38$ python3 99b.py
1x1=1   2x1=2   3x1=3   4x1=4   5x1=5   6x1=6   7x1=7   8x1=8   9x1=9
2x2=4   3x2=6   4x2=8   5x2=10  6x2=12  7x2=14  8x2=16  9x2=18
3x3=9   4x3=12  5x3=15  6x3=18  7x3=21  8x3=24  9x3=27
4x4=16  5x4=20  6x4=24  7x4=28  8x4=32  9x4=36
5x5=25  6x5=30  7x5=35  8x5=40  9x5=45
6x6=36  7x6=42  8x6=48  9x6=54
7x7=49  8x7=56  9x7=63
8x8=64  9x8=72
9x9=81
test38$
test38$ cat 99c.py
for i in range(1, 10):
    for b in range(1, 10-i):
        print(end="        ");
    for j in range(1, i+1):
        print('{}x{}={}\t'.format(j, i, i*j), end='')
    print()
test38$ python3 99c.py
                                                                1x1=1
                                                        1x2=2   2x2=4
                                                1x3=3   2x3=6   3x3=9
                                        1x4=4   2x4=8   3x4=12  4x4=16
                                1x5=5   2x5=10  3x5=15  4x5=20  5x5=25
                        1x6=6   2x6=12  3x6=18  4x6=24  5x6=30  6x6=36
                1x7=7   2x7=14  3x7=21  4x7=28  5x7=35  6x7=42  7x7=49
        1x8=8   2x8=16  3x8=24  4x8=32  5x8=40  6x8=48  7x8=56  8x8=64
1x9=9   2x9=18  3x9=27  4x9=36  5x9=45  6x9=54  7x9=63  8x9=72  9x9=81
test38$

test38$ cat 99d.py
for i in range(1,10):
    for k in range(1,i):
        print (end="       ")
    for j in range(i,10):
        print("%d*%d=%2d" % (i,j,i*j),end=" ")
    print("")
test38$ python3 99d.py
1*1= 1 1*2= 2 1*3= 3 1*4= 4 1*5= 5 1*6= 6 1*7= 7 1*8= 8 1*9= 9
       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*3= 9 3*4=12 3*5=15 3*6=18 3*7=21 3*8=24 3*9=27
                     4*4=16 4*5=20 4*6=24 4*7=28 4*8=32 4*9=36
                            5*5=25 5*6=30 5*7=35 5*8=40 5*9=45
                                   6*6=36 6*7=42 6*8=48 6*9=54
                                          7*7=49 7*8=56 7*9=63
                                                 8*8=64 8*9=72
                                                        9*9=81
test38$ cat 99e
cat: 99e: No such file or directory
test38$ cat 99x.py
for i in range(1, 10):
	for j in range(1, 10):
        print(" {} ".format( i*j) , end="")
    print()
test38$ python3 99x.py
 1  2  3  4  5  6  7  8  9
 2  4  6  8  10  12  14  16  18
 3  6  9  12  15  18  21  24  27
 4  8  12  16  20  24  28  32  36
 5  10  15  20  25  30  35  40  45
 6  12  18  24  30  36  42  48  54
 7  14  21  28  35  42  49  56  63
 8  16  24  32  40  48  56  64  72
 9  18  27  36  45  54  63  72  81
test38$

test38$
test38$ cat 999.py
for i in range(1, 10):
    for j in range(1, 10):
        print(" %2d" % (i*j), end=" ")
    print()
test38$ python3 999.py
  1   2   3   4   5   6   7   8   9
  2   4   6   8  10  12  14  16  18
  3   6   9  12  15  18  21  24  27
  4   8  12  16  20  24  28  32  36
  5  10  15  20  25  30  35  40  45
  6  12  18  24  30  36  42  48  54
  7  14  21  28  35  42  49  56  63
  8  16  24  32  40  48  56  64  72
  9  18  27  36  45  54  63  72  81
test38$



test38$ cat 991a.py

for i in range(1, 10):
    print( "第 %d 列"  % i)
test38$ python3 991a.py
第 1 列
第 2 列
第 3 列
第 4 列
第 5 列
第 6 列
第 7 列
第 8 列
第 9 列
test38$

test38$ cat 991b.py 

for i in range(1, 10):
    print( "第 {} 列".format( i) )
test38$ python3 991b.py
第 1 列
第 2 列
第 3 列
第 4 列
第 5 列
第 6 列
第 7 列
第 8 列
第 9 列
test38$



test38$ cat padd.py
# Use variables num1 and num2 to store input numbers
num1 = input('Enter first number: ')
num2 = input('Enter second number: ')

# Add two numbers
sum = float(num1) + float(num2)

# Display the sum
print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))
print('Again, The sum of {} and {} is {}'.format(num1, num2, sum))
test38$

test38$ python3 padd.py
Enter first number: 123
Enter second number: 456.38
The sum of 123 and 456.38 is 579.38
Again, The sum of 123 and 456.38 is 579.38
test38$

test38$

# Python 的 float 就是其它語言的 double, 準確度大約 16 位多一點 (54 * 0.3010)
test38$ cat p.py

#x=123456789012345.0
#x=0.2    ===>  0.2 + 0.8 = around 1.0
y=0.001
def dodo(x):
  ans = float(x)
  for i in range(0, 800):    # 0.001 *800 = 0.8
    ans += y
  return ans    # 回傳答案
#please give me 0.1 ~ 12345
x = input("Give me x: ");
print( )
print("Before Loop, x=", x)
print(" After Loop, x=", dodo(x) )
#
#please give me 1234567890135246.0
x = input("Give me x: ");
print( )
print("Before Loop, x=", x)
print(" After Loop, x=", dodo(x) )
test38$

test38$ python3 p.py
Give me x: 100

Before Loop, x= 100
 After Loop, x= 100.80000000000382
Give me x: 0.2

Before Loop, x= 0.2
 After Loop, x= 1.0000000000000007
test38$

test38$ !py
Give me x: 123456789

Before Loop, x= 123456789
 After Loop, x= 123456789.80000162
Give me x: 1234567890

Before Loop, x= 1234567890
 After Loop, x= 1234567890.799942
test38$

test38$ !py
python3 p.py
Give me x: 12345678901234.0

Before Loop, x= 12345678901234.0
 After Loop, x= 12345678901235.562
Give me x: 123456789012345.0

Before Loop, x= 123456789012345.0
 After Loop, x= 123456789012345.0
test38$
# 注意看上面.. Loop 前後答案相同 ! 這表示 加了 800 次也沒用 ! Why? 



使用 while True:  不斷的做直到輸入是 -1


test38$ cat p2.py

x=1234567890135246.0
#x=0.2
y=0.001
def dodo(x):
  ans = float(x)
  for i in range(0, 800):    # 0.001 *800 = 0.8
    ans += y
  return ans
#please give me  -1 to stop 
x = input("Give me x: ");
while(True):
   if( x == "-1"): break;
   print("Before Loop, x=", x)
   print(" After Loop, x=", dodo(x) )
   print() 
   x = input("Give me x: ");
   #
print("Bye bye !") 
test38$ python3 p2.py
Give me x: 0
Before Loop, x= 0
 After Loop, x= 0.8000000000000006

Give me x: 100
Before Loop, x= 100
 After Loop, x= 100.80000000000382

Give me x: 100.2
Before Loop, x= 100.2
 After Loop, x= 101.00000000000382

Give me x: 123456789012.1
Before Loop, x= 123456789012.1
 After Loop, x= 123456789012.90567

Give me x: 123456789012345.0
Before Loop, x= 123456789012345.0
 After Loop, x= 123456789012345.0

# 注意看上面.. Loop 前後答案相同 ! 這表示 加了 800 次也沒用 ! Why? 

Give me x: 12345678901234.0
Before Loop, x= 12345678901234.0
 After Loop, x= 12345678901235.562
# 注意看上面.. 理論上應該只加入 0.8 ... 可是多 1.562  哪也安捏 ???

Give me x: 1234567890123.0
Before Loop, x= 1234567890123.0
 After Loop, x= 1234567890123.7812
# 注意看上面.. 理論上應該只加入 0.8 ... 可是 這 0.7812 也不太夠 ???

Give me x: -1
Bye bye !
test38$

gg = input("Give me 3 numbers: ")
gg += ",-1,-1,-1"    # 萬一他都沒打字
gg = gg.replace(" ", ",")  # 空格改為逗號
gg = gg.split(",")  # 根據逗號拆開
gg = [x for x in gg if x != ""]   # 去除所有空字串
(x, y, z, *_) = gg   #  前三個放入 x, y, z
try:   # 必要時以下三個分開 try:...
   x = float(x)   # 假設你要實數
   y = float(y)   # 先這樣萬一輸入有小數點也沒關係 :-)
   if y == -1: y = -1
   else:  y = int(y+0.5)   # 假設這要整數, 即使輸入有小數, 也轉為整數, 四捨五入
   z = float(z)  # 假設這個要實數
except:
   print("input x y z something wrong!")
   if not type(x) is float: x = -1
   if not type(y) is int: y = -1
   if not type(z) is float: z = -1
if(x >= 0):
   print("x=", x)
if(y >= 0):
   print("y=", y)
if(z >= 0):
   print("z=", z)
## 注意, 我們這裡是假設 -1  代表沒輸入或輸入了不要的值!