Input,Output in C language

In C, input is typically read from the keyboard, while output is displayed on the screen. C provides several standard library functions for input and output operations, such as:

1.printf() :

This function is used to display output on the screen. It allows you to print formatted text, variables, and constants.

                
    #include <stdio.h>
    int main(){
        int age= 25;
        printf("My age is %d years.\n",age);
        return 0;
    }

                
            

2.scanf() :This function is used to read input from the keyboard. It allows you to read data into variables based on specified format specifiers.

                
    #include <stdio.h>
    int main() {
        int age; 
        printf("Enter your age: ");
        scanf("%d", &age); 
        printf("You entered: %d\n", age); 
        return 0; 
        } 
    }

    
    

3.puts() and gets() :These functions are used for simple input/output. 'puts()' prints a string to the screen with a newline, and 'gets()' reads a line of text from the keyboard.

        
    #include <stdio.h>
    int main() { 
        char name[50];
        printf("Enter your name: ");
        gets(name); 
        printf("Hello, %s!\n", name);
        return 0; 
        } 
    }

    
    

4.getchar() and putchar() :These functions are used to read a single character from the keyboard and print a single character on the screen, respectively.

                
            #include <stdio.h>
            int main() { 
                char ch; 
                printf("Enter a character: "); 
                ch = getchar(); 
                putchar(ch); 
                return 0; 
                } 
                } 
            }