﻿ Python: Display a given decimal value in scientific notation - w3resource

# Python: Display a given decimal value in scientific notation

## Python module: Exercise-7 with Solution

Write a Python program to display a given decimal value in scientific notation. Use decimal.Decimal

Sample Solution:

Python Code:

``````import decimal
#Source: https://bit.ly/2SfZEtL
def format_e(n):
a = '%E' % n
return a.split('E').rstrip('0').rstrip('.') + 'E' + a.split('E')

print("Original decimal value: "+ "40800000000.00000000000000")
print("Scientific notation of the said decimal value:")
print(format_e(decimal.Decimal('40800000000.00000000000000')))
print("\nOriginal decimal value: "+ "40000000000.00000000000000")
print("Scientific notation of the said decimal value:")
print(format_e(decimal.Decimal('40000000000.00000000000000')))
print("\nOriginal decimal value: "+ "40812300000.00000000000000")
print("Scientific notation of the said decimal value:")
print(format_e(decimal.Decimal('40812300000.00000000000000')))
```
```

Sample Output:

```Original decimal value: 40800000000.00000000000000
Scientific notation of the said decimal value:
4.08E+10

Original decimal value: 40000000000.00000000000000
Scientific notation of the said decimal value:
4E+10

Original decimal value: 40812300000.00000000000000
Scientific notation of the said decimal value:
4.08123E+10
```

Flowchart: ## Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

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﻿

## Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

```def tips_collect_dictionary(obj):
inv_obj = {}
for key, value in obj.items():
inv_obj.setdefault(value, list()).append(key)
return inv_obj
ages = {
"Owen": 25,
"Jhon": 25,
"Pepe": 15,
}
print(tips_collect_dictionary(ages))
```

Output:

```{25: ['Owen', 'Jhon'], 15: ['Pepe']}
```

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