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Age, Height, and Grade - C Program

This repository contains a simple C program that demonstrates the use of basic data types and the printf function to output values in C. The program stores a person's age, height, and grade, then prints these values to the console.

Data Types in C

  1. int Integers from value a starting value of -2,147,483,648 and an ending value of 2,147,483,647 i.e. 4 bytes

  2. long Long values range from -9,223,372,036,854,775,808 and goes up to 9,223,372,036,854,775,807. i.e. 8 bytes

  3. float Decimal Values has a size of 4 bytes but has a precision in decimal digits upto 7 digits.

  4. double Decimal Values has a size of 8 bytes but has a precision in decimal digits upto 15 digits.

  5. char A single character with a size of 1 byte its value can range from 128 to 127 or 0 to 255.

  6. short it can have values between -32768 and 32767 i.e. 2 bytes

Adding unsigned infront of any data type can increase its range. Unsigned specifies the computer that the variable is positive only hence all the negative number space can be utilized for a more digits. For eg: short has a range from -32768 to 32767. BUT unsigned short has a range from 0 to 65,535

unsigned can be added to any data type to increase its size;

Constants (const)

consts are data types which cannot be changed unline variables. Where varaibles can be redefined to change there values consts cannot

const int age = 18; Now the variable age cannot be changed into another variable.

Code Explanation

  1. int age = 21; This line declares an integer variable named age and initializes it with the value 21.

  2. float height = 5.9; This line declares a floating-point variable named height and initializes it with the value 5.9.

  3. char grade = 'A'; This line declares a character variable named grade and initializes it with the value 'A'.

  4. printf("Age: %d\n", age); This line uses the printf function to print the value of the age variable to the console. The %d format specifier is used for printing an integer.

  5. printf("Height: %.1f\n", height); This line uses the printf function to print the value of the height variable to the console. The %.1f format specifier is used for printing a floating-point number with one digit after the decimal point.

  6. printf("Grade: %c\n", grade); This line uses the printf function to print the value of the grade variable to the console. The %c format specifier is used for printing a character.