while 循环

打印三角形

line = 0while line < 10:    # 第二循环用来循环行中的每一个*    num = 0    while  num < line + 1:        # end 以什么结尾        print("*",end="")        num +=1    # 换行    print()    line +=1

打印99乘法表

i = 1while i <= 9:    j = 1    while j <= i:        print("%d*%d=%d\t"%(j,i,j*i),end="")        j += 1    print()    i += 1

打印100以内的偶数

num = 0while num <= 100:    if num%2 == 0: # 偶数的判断        print(num)    num += 1

while_else:

listP = ["钱","赵","王","李","张"]i = 0while i < len(listP):    if "王" == listP[i]:        print("已经找到了")        break    i += 1else:    print("没有找到")

break/continue

num = 0while num <= 100:    num += 1    if num == 38:        print("你是38号")        break    print(num)continue #跳出本次循环break  #跳出整个循环

用for循环打印99乘法表

for循环for x in range(1,10):    for y in range(1,x+1):        print("%d*%d=%d"%(y,x,x*y ),end="  ")    print()