Data types in c

In C, data types define what kind of data a variable can hold and how much space it takes up in memory. Think of them as containers of different sizes and shapes.

C data types are generally split into three categories: Basic, Derived (like arrays and pointers), and User-defined (like the struct and union we discussed).

Data TypeKeywordSize (Approx)Range / Use

1. Integerint4 bytesWhole numbers (e.g., -5, 42)

2. Characterchar1 byteSingle characters/ASCII (e.g., 'A', '$')

#include <stdio.h>

int main() {
    // Basic types
    int age = 25;
    float salary = 4500.50;
    double distance = 1234567.8910;
    char grade = 'A';

    // Modifiers
    unsigned int positiveOnly = 500;
    long long hugeNumber = 9223372036854775807LL;

    printf("Integer: %d\n", age);
    printf("Float: %.2f\n", salary);
    printf("Double: %.4lf\n", distance);
    printf("Character: %c\n", grade);
    printf("Unsigned: %u\n", positiveOnly);
    printf("Long Long: %lld\n", hugeNumber);

    return 0;
}

Expected output:

Integer: 25
Float: 4500.50
Double: 1234567.8910
Character: A
Unsigned: 500
Long Long: 9223372036854775807