# Python: Calculate the average of the numbers a through b rounded to nearest integer, in binary

## Python Programming Puzzles: Exercise-81 with Solution

Write a Python program to calculate the average of the numbers a through b (b not included) rounded to the nearest integer, in binary (or -1 if there are no such numbers).

Input: 4 , 7 Output: 0b101 Input: 11 , 19 Output: 0b1110

**Pictorial Presentation:**

**Sample Solution:**

**Python Code:**

```
#License: https://bit.ly/3oLErEI
def test(a,b):
r = range(a, b)
if len(r) == 0:
return "-1"
return bin(round(sum(r) / len(r)))
a = 4
b = 7
print("Range:",a,",",b)
print("Average of the numbers",a,"through",b,"rounded to nearest integer, in binary:")
print(test(a, b))
a = 11
b = 19
print("\nRange:",a,",",b)
print("Average of the numbers",a,"through",b,"rounded to nearest integer, in binary:")
print(test(a, b))
```

Sample Output:

Range: 4 , 7 Average of the numbers 4 through 7 rounded to nearest integer, in binary: 0b101 Range: 11 , 19 Average of the numbers 11 through 19 rounded to nearest integer, in binary: 0b1110

**Flowchart:**

**Python Code Editor :**

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