C PROGRAMMING PROGRAM • BASICS & INPUT/OUTPUT

Convert Fahrenheit to Celsius

Learn how to convert fahrenheit to celsius using a clear C program.

BeginnerdoubleFormulaConversion

PROBLEM UNDERSTANDING

Input and expected output

Sample input

98.6

Sample output

Celsius = 37.00

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    double fahrenheit, celsius;

    printf("Enter temperature in Fahrenheit: ");
    scanf("%lf", &fahrenheit);
    celsius = (fahrenheit - 32.0) * 5.0 / 9.0;
    printf("Celsius = %.2f\n", celsius);
    return 0;
}

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

No line selected

EXPECTED OUTPUT FOR THE SAMPLE

Celsius = 37.00

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Subtract 32 from Fahrenheit and multiply the result by 5/9.
Display the computed result.

Subtract 32 from Fahrenheit and multiply the result by 5/9.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

Check this

Use the correct format specifier for every variable.

Check this

Initialize variables before using their values.

Check this

Check braces, semicolons and input order carefully.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.