C program to convert temperature from degree celsius to fahrenheit

Write a C program to input temperature in Centigrade and convert to Fahrenheit. How to convert temperature from degree centigrade to degree Fahrenheit in C programming. Logic to convert temperature from Celsius to Fahrenheit in C.

Example
Input

Enter temperature in Celsius = 100

Output

Temperature in Fahrenheit = 212 F

Required knowledge

Arithmetic operators, Variables and expressions, Data types, Basic input/output

Temperature conversion formula

Temperature conversion formula from degree Celsius to Fahrenheit is given by -
Celsius to Fahrenheit conversion formula

Logic to convert temperature from Celsius to Fahrenheit

The logic of temperature conversion exists in converting mathematical formula to C expression. You just need to convert mathematical formula of temperature in C language. Rest is simple input/output.

Below is the step by step descriptive logic to convert temperature from degree Celsius to Fahrenheit.

  1. Input temperature in Celsius from user. Store it in some variable say celsius.
  2. Apply formula to convert the temperature to Fahrenheit i.e. fahrenheit = (celsius * 9 / 5) + 32.
  3. Print the value of fahrenheit.

Program to convert temperature from Celsius to Fahrenheit

/**
 * C program to convert temperature from degree celsius to fahrenheit
 */

#include <stdio.h>

int main()
{
    float celsius, fahrenheit;

    /* Input temperature in celsius */
    printf("Enter temperature in Celsius: ");
    scanf("%f", &celsius);

    /* celsius to fahrenheit conversion formula */
    fahrenheit = (celsius * 9 / 5) + 32;

    printf("%.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);

    return 0;
}

%.2f is used to print fractional numbers up to two decimal places. You can also use %f to print fractional normally up to six decimal places.

Output

Enter temperature in Celsius: 100
100 Celsius = 212.00 Fahrenheit

Happy coding 😉

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