1.7- sizeof() Function In C Programming Language | c language tutorial for beginners

1.7- sizeof() Function In C Programming Language | c language tutorial for beginners

What is the sizeof() function in C? The sizeof() function in C is a built-in function that is used to calculate the size (in bytes)that a data type occupies in the computer's memory. A computer's memory is a collection of byte-addressable chunks.

sizeof function in C programming language is used to evaluate the size of data type,variable.
sizeof operators looks like function still it is considered as operator in c programming.

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1.6- scanf() function In C Programming Languages | c language tutorial for beginners | scanf() in c

The printf() and scanf() functions are used for input and output in C language. Both functions are inbuilt library functions, defined in stdio.h (header file).

printf() function
The printf() function is used for output. It prints the given statement to the console.

The syntax of printf() function is given below:

printf("format string",argument_list);
The format string can be %d (integer), %c (character), %s (string), %f (float) etc.

scanf() function
The scanf() function is used for input. It reads the input data from the console.

scanf("format string",argument_list);
Program to print cube of given number
Let's see a simple example of c language that gets input from the user and prints the cube of the given number.

int main(){
int number;
printf("enter a number:");
scanf("%d",&number);
printf("cube of number is:%d ",number*number*number);
return 0;
}
Output

enter a number:5
cube of number is:125
The scanf("%d",&number) statement reads integer number from the console and stores the given value in number variable.

The printf("cube of number is:%d ",number*number*number) statement prints the cube of number on the console.

Program to print sum of 2 numbers
Let's see a simple example of input and output in C language that prints the addition of 2 numbers.

int main(){
int x=0,y=0,result=0;

printf("enter first number:");
scanf("%d",&x);
printf("enter second number:");
scanf("%d",&y);

result=x+y;
printf("sum of 2 numbers:%d ",result);

return 0;
}
Output

enter first number:9

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