a = 101

print(f"a+1={a+1}")

a = "5"

b = 5

print (f"{a}+{b}")

N = int (input ("请输入正整数:"))

if N % 3:

    print ("第 3 行代码", N % 3, sep = "")

else:

   print (" 第 4 行代码 ", N % 3, sep ="")

Sum = 0

for i in range (10):

    Sum += i

print (i,Sum)

N = int (input ("请输入整数:"))

Flag = False

if N >= 2:

    Flag = True

    for i in range (2,N):

        if N % i == 0:

            Flag = False

            break

if Flag == True:

    print ("是质数")

else:

    print ("不是质数")

N = int (input ("请输入正整数:"))

i = 1

Sum = 0

while i <= N:

    if i % 2 == 1:

        Sum += i

    i += 1

print (i,Sum)

import turtle

for i in range (1,10,2):

    if i % 3 == 0:

        turtle.pencolor ("red")

    else:

         turtle.pencolor ("blue")

    turtle.forward (50)

import turtle

turtle.circle (100)

turtle.circle (100, 360, 8)

turtle.circle (100, 180, 4)

import turtle

for d in range (10,_______ ,10):

    turtle.left (90)

    turtle.forward (d)

（含图）

（含图）

import turtle

for i in range (4):

    turtle.circle (50)

    turtle.left (_______)