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C PROGRAMMING PROGRAM • BASICS & INPUT/OUTPUT

Convert Kilometres to Miles

Learn how to convert kilometres to miles using a clear C program.

BeginnerUnit conversiondoubleConstants

PROBLEM UNDERSTANDING

Input and expected output

Sample input
10
Sample output
Miles = 6.214

COMPLETE C PROGRAM

Complete C implementation

kilometres-to-miles.c
Open in compiler
#include <stdio.h>

int main(void)
{
    double kilometres;

    printf("Enter distance in kilometres: ");
    scanf("%lf", &kilometres);
    printf("Miles = %.3f\n", kilometres * 0.621371);
    return 0;
}

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

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EXPECTED OUTPUT FOR THE SAMPLE

Miles = 6.214
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Read the required input values.
  2. Multiply kilometres by the conversion factor 0.621371.
  3. Display the computed result.

Multiply kilometres by the conversion factor 0.621371.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

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Initialize variables before using their values.

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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.