python基本语法练习实例

时间:2021-05-23

1、打印九九乘法表

#只打印结果for i in range(1,10): for j in range(1,i+1): print(i*j,end=" ") print() #打印算数表达式for i in range(1,10): for j in range(1,i+1): print("{0}*{1} = {2:2}".format(j,i,i*j),end=" ") print() 1*1 = 1 1*2 = 2 2*2 = 4 1*3 = 3 2*3 = 6 3*3 = 9 1*4 = 4 2*4 = 8 3*4 = 12 4*4 = 16 1*5 = 5 2*5 = 10 3*5 = 15 4*5 = 20 5*5 = 25 1*6 = 6 2*6 = 12 3*6 = 18 4*6 = 24 5*6 = 30 6*6 = 36 1*7 = 7 2*7 = 14 3*7 = 21 4*7 = 28 5*7 = 35 6*7 = 42 7*7 = 49 1*8 = 8 2*8 = 16 3*8 = 24 4*8 = 32 5*8 = 40 6*8 = 48 7*8 = 56 8*8 = 64 1*9 = 9 2*9 = 18 3*9 = 27 4*9 = 36 5*9 = 45 6*9 = 54 7*9 = 63 8*9 = 72 9*9 = 81 #将打印矩阵转置一下for i in range(1,10): print(" " *10*(i-1), end = " ") for j in range(i,10): print("{0}*{1} = {2:<2}".format(i,j,i*j),end=" ") print() 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

2、打印一个菱形(行数为奇数行)

for i in range(-3,4): prespace=(-i if i<0 else i) print(" "*prespace + '*'*(7-2*prespace)) * *** ************ ***** *** * #变形之打印一道闪电while True: line_max = int(input("please input a odd number: ")) if line_max % 2: breakrange_num = (line_max + 1)//2 for i in range(-range_num+1,range_num): if i == 0: print('*'*line_max) elif i > 0: print(' '*(range_num-1) + "*"*(range_num-i)) else: print(' '*(-i) + '*'*(range_num+i)) * ** ********** *** ** * #变形之打印掏空的菱形for i in range(-4,5): if i == -4 or i == 4: print('*'*9) else: prespace=(-i+1 if i<0 else i+1) print("*"*prespace + ' '*(9-2*prespace) + "*"*prespace) ************* ******* ***** *** *** ***** ******* *************

3、打印100以内的斐波那契数列

f0, f1 = 0, 1while f1 <= 100: print(f1, end = " ") t = f1 f1 = t + f0 f0 = t

暂时还不理解的写法:

f0, f1 = 0, 1while f1 <= 100: print(f1) f0, f1 = f1, f0 + f1 #python对这样的赋值怎样处理

4、求斐波那契数列第101项

f0, f1 = 0, 1for i in range(3,102): t = f1 f1 = t + f0 f0 = telse: print(f1)

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