Use of getch(),getche() and getchar() in C

• getchar()
• getche()
• getch()

Function : getchar()

getchar() is used to get or read the input (i.e a single character) at run time.

Library:

<CONIO.H>

Declaration:

int getchar(void);

Example Declaration:

char ch;
ch = getchar();

Return Value:

This function return the character read from the keyboard.

Example Program:

void main()
{

char ch;
ch = getchar();
printf("Input Char Is :%c",ch);

}

Program Explanation:

Here,declare the   variable  ch as  char data type, and then get a value through  getchar()library function and store it in the variable  ch.And then,print the value of variable  ch.

During the program execution, a single character is get or read through  the getchar(). The given value is displayed on the screen and the compiler wait for another character to be typed. If you press the enter key/any other characters and then only the given character is  printed through the  printf function.

Function : getche()

getche() is used to get a character from console, and echoes to the screen.

Library:

<CONIO.H>

Declaration:

int getche(void);

Example Declaration:

char ch;
ch = getche();

Remarks:

getche reads a single character from the keyboard and echoes it to the current text window, using direct video or BIOS.

Return Value:

This function return the character read from the keyboard.

Example Program:

void main()
{

char ch;
ch = getche();
printf("Input Char Is :%c",ch);

}

Program Explanation:

Here,declare the   variable  ch as  char data type, and then get a value through  getche()library function and store it in the variable  ch.And then,print the value of variable  ch.

During the program execution, a single character is get or read through  the getche(). The given value is displayed on the screen and the compiler does not wait for another character to be typed.  Then,after wards the character is  printed  through the   printffunction.

Function : getch()

getch() is used to get a character from console but does not echo to the screen.

Library:

<CONIO.H>

Declaration:

int getch(void);

Example Declaration:

char ch;
ch = getch(); (or ) getch();

Remarks:

getch reads a single character directly from the keyboard, without echoing to the screen.

Return Value:

This function return the character read from the keyboard.

Example Program:

void main()
{

char ch;
ch = getch();
printf("Input Char Is :%c",ch);

}

Program Explanation:

Here,declare the   variable  ch as  char data type, and then get a value through  getch()library function and store it in the variable  ch.And then,print the value of variable  ch.
During the program execution, a single character is get or read through  the getch(). The given value is not displayed on the screen and the compiler does not wait for another character to be typed. And then,the given character is  printed through the  printffunction.