For i=1 to 10 Step 4
s=s+i
Next i
该程序段执行后,语句s=s+i执行的次数是( )
a=0
while a<10
a=a+1
print("a的最终结果是",a)
>>>a的最终结果是 9
for i in ① :
print("第",i,"位同学")
a=0
for j in ② :
a=a+int(input("请输入第"+str(j)+"科考试成绩:"))
print("该生的总成绩为:",a)
For i=1 To 5
For j=1 To 3
Print”*”
Next j
Next i
Private Sub Form-Click()
Dim S As Integer
Dim N As Integer
N=0
S=0 ‘S变量存放的是总和
Do While (条件)
N=N+1
S=S+N
Loop
Text1. Text=Str()
End Sub
n=0
for i in range(1, 30) :
if i%5==0:
n=n+1
print (n)
count=0 #拥于记录试错的次数
rightname=“admin”
rightpasswd=“admin123”
while :#只允许试错3次
name=input(“请输入用户名:”)
passwd=input(“请输入密码:”)
if name==rightname passwd==rightpasswd:
print(“登录成功!”)
#如果登录成功,则直接跳出循环
else:
print(“登录失败!”)
#试错次数+1
else:
print(“登录次数超过三次,请稍后登录”)
i=1
while i<=100:
print(“*”)
i=i+1
Private Sub Timer1_Time( )
For i= 0 To 10 Step 1
Shape l(0) BackColor= RGB(Int(Rnd * 256), Int(Rnd * 256), In(Rnd * 256)
Next i
End Sub
①p=5 (a+b+p) ②if a>0 then b=b+1
③t1.text=”请输入密码:” ④For i=1 to 10 do j=j*2
For循环变量=初值 To 终值 [Step 步长]
[循环体]
Next [{循环变量]
请画出For循环执行的流程框图