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Sagot :
Certainly! Here is a detailed, step-by-step solution for the given problem of converting a fraction to a decimal:
### Step-by-Step Solution:
1. Prompt the user to enter the numerator and denominator:
- First, ask the user to input the numerator.
- Then, ask the user to input the denominator.
2. Store the user's inputs:
- Store the numerator in a variable named `numerator`.
- Store the denominator in a variable named `denominator`.
3. Check if the denominator is zero:
- Use an `if-else` statement to check if the value of the denominator is zero.
4. Handle the case when the denominator is zero:
- If the denominator is zero, print out the message "Cannot divide by zero."
5. Calculate the decimal value:
- If the denominator is not zero, perform the division `numerator / denominator` to calculate the decimal value.
6. Display the result:
- Print the result in the format "Decimal: X", where X is the calculated decimal value.
### Python Program:
```python
def convert_fraction_to_decimal():
# Prompt the user to enter the numerator
numerator = float(input("Enter the numerator: "))
# Prompt the user to enter the denominator
denominator = float(input("Enter the denominator: "))
# Check if the denominator is zero
if denominator == 0:
# If denominator is zero, division is not possible
print("Cannot divide by zero.")
else:
# Calculate the decimal value
decimal_value = numerator / denominator
# Print the result
print("Decimal:", decimal_value)
# Call the function to execute the program
convert_fraction_to_decimal()
```
### Explanation:
- Input Handling:
- The `input` function is used to take input from the user. The inputs are stored in the variables `numerator` and `denominator`.
- Checking Denominator:
- An `if` statement checks if the `denominator` is zero. If it is, a message "Cannot divide by zero." is printed.
- Division and Output:
- If the `denominator` is not zero, the division is performed, and the result is stored in `decimal_value`.
- The result is then printed in the expected format.
### Sample Runs:
1. When the denominator is zero:
```
Enter the numerator: 2
Enter the denominator: 0
Cannot divide by zero.
```
2. When the denominator is not zero:
```
Enter the numerator: 4
Enter the denominator: 5
Decimal: 0.8
```
This solution ensures that the program handles both valid and invalid inputs correctly, making use of `if-else` statements to provide the necessary checks and calculations.
### Step-by-Step Solution:
1. Prompt the user to enter the numerator and denominator:
- First, ask the user to input the numerator.
- Then, ask the user to input the denominator.
2. Store the user's inputs:
- Store the numerator in a variable named `numerator`.
- Store the denominator in a variable named `denominator`.
3. Check if the denominator is zero:
- Use an `if-else` statement to check if the value of the denominator is zero.
4. Handle the case when the denominator is zero:
- If the denominator is zero, print out the message "Cannot divide by zero."
5. Calculate the decimal value:
- If the denominator is not zero, perform the division `numerator / denominator` to calculate the decimal value.
6. Display the result:
- Print the result in the format "Decimal: X", where X is the calculated decimal value.
### Python Program:
```python
def convert_fraction_to_decimal():
# Prompt the user to enter the numerator
numerator = float(input("Enter the numerator: "))
# Prompt the user to enter the denominator
denominator = float(input("Enter the denominator: "))
# Check if the denominator is zero
if denominator == 0:
# If denominator is zero, division is not possible
print("Cannot divide by zero.")
else:
# Calculate the decimal value
decimal_value = numerator / denominator
# Print the result
print("Decimal:", decimal_value)
# Call the function to execute the program
convert_fraction_to_decimal()
```
### Explanation:
- Input Handling:
- The `input` function is used to take input from the user. The inputs are stored in the variables `numerator` and `denominator`.
- Checking Denominator:
- An `if` statement checks if the `denominator` is zero. If it is, a message "Cannot divide by zero." is printed.
- Division and Output:
- If the `denominator` is not zero, the division is performed, and the result is stored in `decimal_value`.
- The result is then printed in the expected format.
### Sample Runs:
1. When the denominator is zero:
```
Enter the numerator: 2
Enter the denominator: 0
Cannot divide by zero.
```
2. When the denominator is not zero:
```
Enter the numerator: 4
Enter the denominator: 5
Decimal: 0.8
```
This solution ensures that the program handles both valid and invalid inputs correctly, making use of `if-else` statements to provide the necessary checks and calculations.
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