# Python: Reads n digits chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals to another given number(s)

## Python Basic - 1: Exercise-48 with Solution

Write a Python program that reads n digits (given) chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals to another given number (s). Do not use the same digits in a combination.

**Input:**

Two integers as number of combinations and their sum by a single space in a line. Input 0 0 to exit.

**Sample Solution**:

**Python Code:**

```
import itertools
print("Input number of combinations and sum, input 0 0 to exit:")
while True:
x, y = map(int, input(). split())
if x == 0 and y == 0:
break
s = list(itertools.combinations(range(10), x))
ctr = 0
for i in s:
if sum(i) == y:
ctr += 1
print(ctr)
```

Sample Output:

Input number of combinations and sum, input 0 0 to exit: 5 6 2 4 0 0 2

**Flowchart:**

**Python Code Editor:**

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**Previous:** Write a Python program which reads a text (only alphabetical characters and spaces.) and prints two words. The first one is the word which is arise most frequently in the text. The second one is the word which has the maximum number of letters.

**Next:** Write a Python program which reads the two adjoined sides and the diagonal of a parallelogram and check whether the parallelogram is a rectangle or a rhombus.

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## Python: Tips of the Day

**Checks if the given number falls within the given range.**

Example:

def tips_range(n, start, end = 0): return start <= n <= end if end >= start else end <= n <= start print(tips_range(2, 4, 6)) print(tips_range(4, 8)) print(tips_range(1, 3, 5)) print(tips_range(1, 3))

Output:

False True False True

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