Conversion some physical quantity

[maddeshiyashushil01-beep]

#include <stdio.h>

int main() { float first, second; char input;

// Conversion factors
float kmsToMiles = 0.621371;
float inchesToFoot = 0.0833333;
float inchesTocm=2.54;
float kmTom=1000;

while (1) {
    printf("\nEnter the input character. q to quit\n");
    printf("1. kms to miles\n");
    printf("2. inches to foot\n");
    printf("3. inches to cm\n");
    printf("4. km to m\n");
    scanf(" %c", &input);   // Note: space before %c to handle newline

    switch (input) {
        case 'q':
            printf("Quitting the program...\n");
            return 0;

        case '1':
            printf("Enter quantity in kms: ");
            scanf("%f", &first);
            second = first * kmsToMiles;
            printf("%f Kms is equal to %f Miles\n", first, second);
            break;

        case '2':
            printf("Enter quantity in inches: ");
            scanf("%f", &first);
            second = first * inchesToFoot;
            printf("%f Inches is equal to %f Foot\n", first, second);
            break;
            
            
        case '3':
            printf("Enter quantity in inches: ");
            scanf("%f", &first);
            second = first * inchesTocm;
            printf("%f Inches is equal to %f cm\n", first, second);
            break;
            
            
        case '4':
            printf("Enter quantity in km: ");
            scanf("%f", &first);
            second = first * kmTom;
            printf("%f km is equal to %f m\n", first, second);
            break;

        default:
            printf("Invalid input, try again!\n");
    }
}

return 0;

}