putchar() to display single char

Moving the crusher to next line

putchar('\n');

printf( "Enter any char from keyboard ");
putchar ('\n'); // Move the crusher to next line
var = getchar();
putchar(var);

#include <stdio.h>
#include <ctype.h>
int main(void){
char var;
printf( "Enter any char from keyboard ");
putchar ('\n'); // Move the crusher to next line

var = getchar();
  if(islower(var))
  {
  putchar(toupper(var));
	}
 else
 {
 putchar(tolower(var));
  }
return 0;
}

Example 1: Printing Characters of a String One by One

This example demonstrates how to use putchar() to print each character of a string individually.

#include <stdio.h>

int main() {
    char str[] = "plus2net";
    int i = 0;
    
    while (str[i] != '\0') {
        putchar(str[i]);
        i++;
    }
    
    return 0;
}

plus2net

Example 2: Using putchar() in a Loop to Print A-Z

Print the alphabet using a loop and putchar().

#include <stdio.h>

int main() {
    for (char c = 'A'; c <= 'Z'; c++) {
        putchar(c);
        putchar(' ');  // Adding space for readability
    }
    
    return 0;
}

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Example 3: Replacing printf() with putchar() for Characters

This example demonstrates how to replace printf() with putchar() to print characters one by one.

#include <stdio.h>

int main() {
    printf("With printf():\n");
    printf("Hello\n");
    
    printf("With putchar():\n");
    putchar('H');
    putchar('e');
    putchar('l');
    putchar('l');
    putchar('o');
    putchar('\n');
    
    return 0;
}

With printf():
Hello
With putchar():
Hello