2.3周而复始的循环　课件　　2023——2024学年教科版（2019）高中信息技术必修1

周而复始的循环 WORK REPORT YEAR-END SIMPLISM STYLE WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT PART A 计数循环 WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT 小怪兽现在的身高是155厘米，若特效增高药一颗增长率为0.015（每吃一颗个子增高0.015倍），问吃5颗后小怪兽身高多少？ 计数循环 WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT 原始身高：155CM 第一颗：155*（1+0.015） 第二颗：155*（1+0.015）*（1+0.015） 第三颗：155*（1+0.015）*（1+0.015）*（1+0.015） 第四颗：155*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015） 第五颗：155*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015） 计数循环 循环：计算机程序周而复始重复同样的步骤 WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT 原始身高：155CM 第一颗：155*（1+0.015） 第二颗：155*（1+0.015）*（1+0.015） 第三颗：155*（1+0.015）*（1+0.015）*（1+0.015） 第四颗：155*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015） 第五颗：155*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015）*（1+0.015） 计数循环 对应流程图 ①循环体 ②循环控制条件（循环要执行多少次） WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT 定义 循环重复次数一定时，我们通常称为计数循环。在Python中，使用for语句来创建这类循环。 for语句的基本格式 for 循环变量 in 列表： 语句或语句组 计数循环 特点：循环次数是已知的 数据类型，包括 列表、字符串、range（）函数产生的整数序列等。 WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT WORK REPORT lenth=155 #初始身高 for i in range(0,5): lenth=lenth*(1+0.015) print(“吃完5颗药后小怪兽的身高：”,lenth,”CM”) #输出结果 计数循环 WORK REP