Basic C programming with line by line explaination for beginners

Hello Programmers! In this blog series I am going to teach you that how you can learn C and how you can practice C! So, here 3 different basic c program for you to practice.

Program 1. (Print any word on screen by c programming)

1 #include <stdio.h>
2  int main()
3  {
4  printf("Hello World");
5  return 0;
6  }

Explanation: With "printf "we print on screen. Here in line 4 you can see “Hello World”. When you run the program ‘Hello world’ will be on your screen. If you use ‘\n’ like : printf("Hello \n World"); then you will get a new line start with ‘world’! So, we can say ‘\n’ start a new line.

Program 2. (Print your own inputs by c programming)
 1 #include <stdio.h>
 2char main()

 3{
 4 char anycharacter,character;
 5 printf("Type a character here");
 6 scanf("%c",&anycharacter);
 7 character=anycharacter;
 8 printf("The Character You Type Is %c",character);
 9  }

Explanation: Here we can input a character and then we can get back it as a printed element! So, you can see in line 6 we take an input which is a character. We can take input by ‘scanf’ . The %c is used for formatting the printing outputs of a character using the printf() or fprintf() . The % indicates that it will change that part of the text with some variable also passed as argument.

Program 3. (Calculate circle area with known radius by c programming)
 1 #include <stdio.h>
 3  #define PI 3.1416
 4  void main()
 5  {
 6  int radius;
 7  float area;
 8  scanf("%d",&radius);
 9  area=PI*(radius*radius);
10  printf("The area of the circle is %f",area);
11  }

Explanation: We know that that the area of a circle is πr*r (pi r square) , where r means radius of a circle. So, if you need the area of a circle then at first you need the radius of that circle as an input. In line 8 we get the input which is an integer value. In line we write the equation where we defined the value of PI in lien 3 and now, we can calculate the area. In line 9 we print the output. %d is for integer and %f is for float.

Stay cool!

Stay creative!