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printf function to display output printf is a pre defined or built in function in C to send formatted outputs. We will first try to send a simple message by using printf function like this.
printf("welcome to plus2net");
The above command will print the message welcome to plus2net
Adding a new line or a like break
To above message we will add one like break by adding \n at the end of it. For a new line we have to use \n ( no space between \ and n ). We will print two lines like this
printf("welcome to plus2net \n C tutorial section");
The above command will output will be
Welcome to plus2net
C tutorial section
Formatted output using printf
WE can display decimal integers by using %d
We will declare one integer variable first and then we will store a value in it. Then we will display the value using printf command.
Note: The statements written after // are comments for easy understanding , these words will not be executed by C compiler
int main(void){
int num; // num is declared as integer variable
num=15; // data is stored
printf("num = %d ", num); // final output
return 0;
}
Here we have formatted the display by saying %d , that is we are sending an integer output. The above statement will display
Num = 15
To display a decimal value we will declare a float variable first and then format it to display. Like this ( changes in above code are only shown )
float num; // num is declared as float variable
num=17.873; // data is stored
printf("num = %5.3f", num); // final output
The output is
num = 17.873
Output of a single char
char var = 'P';
printf(" Welcome to %c ",var);
Displaying string
char var[20] = "Plus2net";
printf(" Welcome to %s ",var);
Output is here
Plus2net
C language is case sensitive, lower and upper case letters are to be treated differently. Printf is not same as printf.
1.Write a program to display sum of two integers
2.Write a program to display a patern like this.
*
**
***
****
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