Python|给定范围内的列表中的数字

给定一个列表，打印给定范围内的数字数量。

例子：

Input : [10, 20, 30, 40, 50, 40, 40, 60, 70] range: 40-80
Output : 6

Input : [10, 20, 30, 40, 50, 40, 40, 60, 70] range: 10-40
Output : 4 

多线方法：
遍历列表并检查每个数字。如果数字在指定范围内，则增加计数器。在遍历结束时，计数器的值将是指定范围内数字数量的答案。
下面是上述方法的Python实现

Python

# Python program to count the
# number of numbers in a given range
# using traversal and multiple line code
 
def count(list1, l, r):
    c = 0
    # traverse in the list1
    for x in list1:
        # condition check
        if x>= l and x<= r:
            c+= 1
    return c
     
# driver code
list1 = [10, 20, 30, 40, 50, 40, 40, 60, 70]
l = 40
r = 80
print count(list1, l, r)

输出：

6

单线方法：
我们可以写一行用于遍历和检查条件：

x for x in list1 if l <= x <= r

条件检查的返回值（true）存储在一个列表中，并在列表的末尾返回答案。
下面是上述方法的Python实现

Python

# Python program to count the
# number of numbers in a given range
 
def count(list1, l, r):
     
    # x for x in list1 is same as traversal in the list
    # the if condition checks for the number of numbers in the range
    # l to r
    # the return is stored in a list
    # whose length is the answer
    return len(list(x for x in list1 if l <= x <= r))
 
# driver code
list1 = [10, 20, 30, 40, 50, 40, 40, 60, 70]
l = 40
r = 80
print count(list1, l, r)

输出：

6