python学习笔记 loop&&raw_input 7&& if

 1 sum = 0;
 2 for x in range(101):
 3     sum += x
 4 print sum
 5 
 6 n = 99
 7 sum = 0
 8 while n > 0:
 9     sum += n
10     n -= 2
11 print sum

for(i =3 ;i < n;i+=2){
//
//
//
}

1 for i in range(3,n+1)
2     #000
3     # 000

 1 age=20
 2 if age >= 6:
 3     print ‘teenager ‘
 4 elif age >= 18:
 5     print ‘adult‘
 6 else:
 7     print ‘kid‘
 8 age = 13
 9 if age > 12  and age < 18:
10     print ‘teenager‘