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getchar() function in C language with Example

Here, we are going to learn about the getchar() function of library function stdio.h in C language with its syntax, example.
Submitted by Souvik Saha, on February 21, 2019

getchar() function in C

The getchar() function is defined in the <stdio.h> header file.

Prototype:

    int getchar(void);

Parameters: FILE *filename(for file handling), otherwise it will be void.

Return type: int

Use of function:

In the file handling, through the getchar() function we take the character from the input stream stdin. The prototype of the function getchar() is int getchar(void);

The character which is read is an unsigned char which is converted to an integer value. In the case of file handling, it returns EOF when end-of-file is encountered. If there is an error then it also returns EOF.

getchar() example in C

#include <stdio.h>
#include <stdlib.h>

int main(){
	//Initialize the character array
	char str[100];
	int i=0,j=0;
	
	printf("Enter the string into the file\n");
	//takes all the characters until enter is pressed
	while((str[i]=getchar())!='\n'){
		//increment the index of the character array
		i++;
	}
	
	//after taking all the character add null pointer 
	//at the end of the string
	str[i]='\0';
	printf("\nThe file content is - ");
	//loop is break when null pointer is encountered
	while(str[j]!='\0'){
		//print the characters
		putchar(str[j]);
		j++;
	}
	
	return 0;
}

Output

getchar() example in C language






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