how to make loops from smallest to largest number?-CodePudding

a = int(input("first number: "))
b = int(input("second number: "))
for x in range (a,b):
    print(x, end = ' ')

I am making a program that would display a number from smallest to largest.

For example: the first number is 10 then the second number is 1.

My expected result is: 1,2,3,4,5,6,7,8,9.

The program that I did is not working if a is lower than b, but is working if the a is higher than b.

CodePudding user response：

If you want it to always go from min to max regardless of which one is min and which is max you could do something like this:

for x in range(min(a, b), max(a, b)):

CodePudding user response：

To count backwards, range has a step parameter: when set to -1, it will count backwards.

a = int(input("first number: "))
b = int(input("second number: "))

step = -1 if a > b else 1
for x in range (a, b, step):
    print(x, end = ' ')

CodePudding user response：

If you want to count backwards then you can specify an additional stepsize of -1 as an argument to the range function as follows:

In [1]: list(range(1,10))
Out[1]: [1, 2, 3, 4, 5, 6, 7, 8, 9]

In [2]: list(range(10,1))
Out[2]: []

In [3]: list(range(10,1,-1))
Out[3]: [10, 9, 8, 7, 6, 5, 4, 3, 2]