Example of how variables work in C

variable_1.c

#include<stdio.h>

int main(void){
    // Example of using variables to hold data
    
    int number = 90;
    
    char string[] = "That is a great score";
    
    char letter = 'A';
    
    printf("Your score was %d%%! %s! You're an %c student!\n\n", number, string, letter);
    
    printf("Putting some new data in our variables...\n\n");
    
    number = 80;
    
    // Array's are immutable (even if the exact same string!)
    // this line of code will cause errors in compilation
    // string = "That is a great score"; 
    
    char new_string[] = "That is a pretty good score";
    
    letter = 'B';
    
    printf("Your score was %d%%! %s! You're a %c student!\n\n", number, new_string, letter);
}