C Program To Convert Fahrenheit To Celsius

In this article, we will learn to write a C Program to convert temperature from Fahrenheit to Celsius by applying the conversion formula to calculate the equivalent temperature in Celsius. For example, 82° in Fahrenheit is equal to 27.7° in Celcius.

Formula to Convert Fahrenheit to Celsius

T(°C) = (T(°F) - 32) × 5/9 

where,

• T(°C): Temperature in Celsius.
• T(°F): Temperature in Farenheit.

Algorithm

1. Define temperature in Fahrenheit Units.
2. Apply the formula to convert temperature in Fahrenheit to Celsius.
3. Print the temperature in Celsius.

Program to Convert Fahrenheit to Celcius in C

C

// C Program to convert
// Fahrenheit to Celsius
#include <stdio.h>

// Function to convert Degree
// Fahrenheit to Degree Celsius
float fahrenheit_to_celsius(float f)
{
    return ((f - 32.0) * 5.0 / 9.0);
}

// Driver code
int main()
{
    float f = 40;

    // Passing parameter to function
    printf("Temperature in Degree Celsius : %0.2f",
           fahrenheit_to_celsius(f));
    return 0;
}

Output

Temperature in Degree Celsius : 4.44

Complexity Analysis

• Time Complexity: O(1)
• Auxiliary Space: O(1)

Please refer complete article on the Program for Fahrenheit to Celsius conversion for more details!