C PROGRAMMING

learn basic advanced project

Hello, aspiring coders!

The code examples below are designed for learning purposes and may not run directly in your terminal.
This section serves as a foundation for your programming journey.
If you've already grasped these concepts, feel free to explore our collection of basic programs. We invite you to keep learning and growing with us. Stay tuned for more exciting content and happy coding!

PRINT HELLO WORLD IN C
#include<stdio.>
int main(){
    printf("HELLO CODERS");
    // in c to print something we have use printf and its syntax
    return 0;
  }

USE OF SCANF IN C 
#include<stdio.>
int main(){
    int num;
    printf("Enter a number: ");
    scanf("%d", &num);
    printf("You entered: %d\n", num);
    return 0;
}
// C provides functions like scanf and printf to read input from the user and display output on the screen.
// return 0; is often used as the exit status code of the main function.

CHECK USING IF CONDITION
#include<stdio.>
int main(){

    if (/*condition*/) {
        // Code to execute if condition is true
    } else {
        // Code to execute if condition is false
    }
    // C allows you to use conditional statements like if, else if, and else to make decisions in your program.
    return 0;
}

FOR LOOP IN C 
for (int i = 0; i < 5; i++) {
    // Code to execute in a loop
}
// C supports various types of loops, including for, while, and do-while, which allow you to execute a block of code repeatedly.

ARRAY IN C  
int numbers[5] = {1, 2, 3, 4, 5};
// C supports arrays, which allow you to store multiple values of the same data type in a single variable.

DATA TYPES IN C 
int age = 30;
float price = 19.99;
char grade = 'A';
// C supports various data types, including integers, floating-point numbers, characters, and more. You can declare variables and assign values to them.

STRUCTURES IN C 
struct Person {
    char name[50];
    int age;
};
// Structures in C allow you to create custom data types that can hold multiple variables with different data types.

POINTERS IN C 
int x = 10;
int *ptr = &x; // Pointer to an integer
// Pointers are a crucial concept in C. They allow you to work with memory addresses and perform operations like dynamic memory allocation.

FUNCTIONS IN C 
int add(int a, int b) {
    return a + b;
}
// You can define your own functions in C to encapsulate blocks of code and make your program modular.

FUNCTION FOR READING AND WRITING IN FILES  IN C 
FILE *file = fopen("data.txt", "r");
if (file != NULL) {
    // Read or write data
    fclose(file);
}
// C provides functions for reading from and writing to files, allowing you to work with external data files.

ADDITION OF TWO NUMBERS
#include<stdio.h>

int main(){
    int a, b,c;
    printf("enter the value of first number");
    scanf("%d",&a);
    printf("enter the value of second number");
    scanf("%d",&b);
    c = a + b;
    printf("the addition of two numbers you entered are %d", c);
    return 0;
}

FIND AVERAGE OF ARRAY ELEMENTS
#include<stdio.h>

int main(){
    int size,sum =0;
     float result;
     printf("enter the size of array");
     scanf("%d",&size);
     int arr[size];
     printf("enter the %d elements in the array",size);
     for(int i=0;i<size;i++){
         scanf("%d",&arr[i]);
         sum +=arr[i];
        }

        result= sum/size;
        printf("average of array elements : %f",result);
        return 0;
    }
    // NOTE : YOU CAN CHANGE FLOAT TO DOUBLE

PROGRAM TO CHECK EVEN ODD 
#include<stdio.h>

int main(){
    int a;
    printf("enter any number to check even odd ");
    scanf("%d",&a);
    if(a%2==0){
        printf("the number you entered %d is even",a);
    }
    else{
        printf("the number you entered %d is odd",a);

    }
    return 0;
}

FIND FACTORIAL OF A NUMBER
#include<stdio.h>

int main(){
    int a,b=1;
    printf("enter any no for factorial");
    scanf("%d",&a);
    for(int i=a;i>0;i--){
        b *=i;
    };
    printf("the factorial of the number you entered is %d",b);
    return 0;
}

Fibonacci number generator
#include<stdio.h>

    int main(){
        int first,second,limit,new;
        printf("enter the first number");
        scanf("%d",&first);
        printf("enter the second number");
        scanf("%d",&second);
        printf("enter the limit ");
        scanf("%d",&limit);
        printf("the first number you entered is %d",first);
        printf("\n the second number you entered is %d",second);


        for(int i=0;i<limit;i++){
            printf("\n%d",first);
            new=first+second;
            first=second;
            second=new;
        }
        return 0;
    }

CHECK LEAP year
#include<stdio.h>

int main(){
    int year;
    printf("enter any year");
    scanf("%d",&year);
    if(year%4==0){
        printf("%d is a leap year",year);
    }
    else{
        printf("%d is not a leap year",year);
    }
    return 0;
}

FIND MAXIMUM NUMBER 
#include<stdio.h>

int main(){
    int a,b,c,d,e;
    char ch;
    printf("NOTE:-- YOU CAN ONLY CHECK MAXIMUM NUMBER AMONG 5 NUMBER YOU ENTER");
    printf("\n IF YOU WANNA CONTINUE PLEASE PRESS Y/y IF NOT PRESS N/n");
        scanf(" %c",&ch);
        if(ch=='y' || ch=='Y'){
            printf("enter the five number");
            scanf("%d %d %d %d %d", &a, &b, &c, &d, &e);
            int max=a;
            if(b>max)
            max=b;
            if(c>max)
            max=c;
            if(d>max)
            max=d;
            if(e>max)
            max=e;
            printf("the maximum number among the five number you entered is %d",max);
        }
        else{
            printf("thankyou for checking the program");

        }
        return 0;
    }

CHECK WHEATHER A NUMBER IS PRIME OR NOT 
#include<stdio.h>

int main (){
    int a,flag=0;
    printf("enter the number to check whether it is prime or not");
    scanf("%d",&a);
    if(a<=1){
        flag=1;
    }
    else{
        for(int i=2;i<=a/2;i++){
            if(a%i==0){
                flag=1;
                break;
            }
        }
    }
    if(flag==0){
        printf("%d is a prime no.",a);
    }
    else{
        printf("%d is not a prime no.",a);
    }
    return 0;
}

Data Type Size Program
#include<stdio.h>


int main() {
    printf("Size of int: %lu bytes\n", sizeof(int));
    printf("Size of char: %lu byte\n", sizeof(char));
    printf("Size of float: %lu bytes\n", sizeof(float));
    printf("Size of double: %lu bytes\n", sizeof(double));
    printf("Size of long: %lu bytes\n", sizeof(long));
    printf("Size of long long: %lu bytes\n", sizeof(long long));
    printf("Size of short: %lu bytes\n", sizeof(short));
    printf("Size of unsigned int: %lu bytes\n", sizeof(unsigned int));
    printf("Size of unsigned char: %lu byte\n", sizeof(unsigned char));
    printf("Size of unsigned long: %lu bytes\n", sizeof(unsigned long));
    printf("Size of unsigned long long: %lu bytes\n", sizeof(unsigned long long));
    printf("Size of unsigned short: %lu bytes\n", sizeof(unsigned short));
    return 0;
}

Dynamic Array Addition Program.
#include<stdio.h>


int main(){
    int size,sum=0;
    printf("enter the size of array");
    scanf("%d",&size);
    int arr[size];
    printf("enter %d elements of your array for addition",size);
    for(int i=0;i<size;i++){
        scanf("%d",&arr[i]);
        sum+=arr[i];
    }
    printf(" the addition of your %d elements you entered is %d",size,sum);
    return 0;
}

SWAPPING OF TWO NUMBERS
#include<stdio.h>

int main(){
    int num1,num2,temp;
    printf("enter two number for swapping ");
        scanf("%d %d",&num1 , &num2);
        printf("the two number before swapping are %d %d",num1,num2);
        temp=num1;
        num1=num2;
        num2=temp;
        printf("the two number after swapping are %d %d" ,num1,num2);
        return 0;
    }

PRINT TABLE OF ANY NUMBER
#include<stdio.h>

int main(){
    int a,b,c;
    printf("enter the number of which you want table");
    scanf("%d",&a);
    printf("enter the limit of your table");
    scanf("%d",&b);
    for(int i=1;i<=b;i++){
        c=a*i;
        printf("\n%d x %d = %d",a,i,c);
    }
    return 0;
}

convert Fahrenheit into Celsius
// this code is used to convert Fahrenheit into Celsius
#include<stdio.h>
int main(){
    float fahrenheit,celsius;
    printf("enter the temperature in celsius");
    scanf("%f",&celsius);
    fahrenheit = (celsius *3.24/1.8)+32;
    printf("the temperature in fahrenheit is %f",fahrenheit);
    return 0;
}