Variable & Data Types – Let us C

Type Casting

Pravesh Agrawal — Sat, 02 Dec 2023 11:29:22 +0000

#include 

int main() {
    // Type casting
    double doubleVar = 3.14;
    int intVar;

    intVar = (int)doubleVar;

    printf("Double: %lf\n", doubleVar);
    printf("Int: %d\n", intVar);

    return 0;
}

Size of Data Types

Pravesh Agrawal — Sat, 02 Dec 2023 11:29:08 +0000

#include 

int main() {
    // Size of data types
    printf("Size of int: %lu bytes\n", sizeof(int));
    printf("Size of float: %lu bytes\n", sizeof(float));
    printf("Size of char: %lu bytes\n", sizeof(char));

    return 0;
}

Constants and Enums

Pravesh Agrawal — Sat, 02 Dec 2023 11:28:54 +0000

#include 

// Enum for days of the week
enum Days { Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday };

int main() {
    // Constants and enums
    const double PI = 3.14159;
    enum Days today = Wednesday;

    printf("Value of PI: %f\n", PI);
    printf("Today is day number: %d\n", today);

    return 0;
}

User Input and Type Conversion

Pravesh Agrawal — Sat, 02 Dec 2023 11:28:40 +0000

#include 

int main() {
    // User input and type conversion
    int num1, num2;
    float result;

    printf("Enter two integers: ");
    scanf("%d %d", &num1, &num2);

    result = (float)num1 / num2;

    printf("Result of division: %f\n", result);

    return 0;
}

Basic Data Types

Pravesh Agrawal — Fri, 01 Dec 2023 14:06:25 +0000

#include 

int main() {
    // Basic data types
    int integerVar = 42;
    float floatVar = 3.14;
    char charVar = 'A';

    printf("Integer: %d\n", integerVar);
    printf("Float: %f\n", floatVar);
    printf("Character: %c\n", charVar);

    return 0;
}