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in Hindi - Reserved Keywords



Reserved Keywords


Reserved Keywords of C Programming
autofloatstruct
breakforswitch
casegototypedef
charifunion
constintunsigned
continuelongvoid
defaultregistervolatile
doreturnwhile
doubleshort
elsesigned
enumsizeof
externstatic

 

Data Types int : Integer type के variable को declare करने के लिए 'int' data type का इस्तेमाल किया जाता है | for e.g. int a=0; 'a' is integer variable.

char : Character type के variable को declare करने के लिए 'char' data type का इस्तेमाल किया जाता है | for e.g. char ch='Hello'; 'ch' is character variable.

double : Double type के variable को declare करने के लिए 'double' data type का इस्तेमाल किया जाता है | इसका उपयोग ज्यादातर नहीं होता , इसके बदले में float data type का इस्तेमाल होता है | for e.g. double num=3.5; 'num' is double variable.

float : Floating type के variable को declare करने के लिए 'float' data type का इस्तेमाल किया जाता है | for e.g. float var=1.20; 'var' is floating variable.

 

Loops Example Output
Do...While Loop

void main(){
int i=0;
do{
printf("%d\n",i);
i++;
}
while(i<5);
}

0
1
2
3
4

For Loop

void main(){
int i;
for(i=0; i<5; i++){
printf("%d\n",i);
}
}

0
1
2
3
4

 

Decision Control/Statements Example Output
if...else Loop

void main(){
int i=10;
if(i==10){
printf("i is equal to 10");
}
else{
printf("i is not equal to 10");
}
}

i is equal to 10
switch..case..default

void main(){

switch(2){

case 1:
printf("expression is 1");
break;
case 2:
printf("expression is 2");
break;
default:
printf("unknown expression");
}

expression is 2

 

Storage Classes Example Output
auto

void main()
{
auto int num = 10 ;
{
auto int num = 5 ;
printf("num : %d\n",num);
}
printf("num : %d",num);
}

num : 5
num : 10

extern

extern int num;
void main()
{
printf("num value comes from General File is %d", num);
}

num value comes from General File is 10

register

void main()
{
register int num=1;
printf("These Number is stored in CPU's register\n");
printf("%d ",num);
}

These Number is stored in CPU's register
1

static

function(){
static int num = 1;
printf("%d",num);
num++;
}
void main()
{
int i;
for(i=0; i<10; i++){
printf("\n");
function();
}
}

1
2
3
4
5
6
7
8
9
10

 

Jumping Statements Example Output
goto

void main(){
int num1, num2, num3;
char ch;
yes : printf("Enter two values\n");
scanf("%d%d",&num1, &num2);
num3 = num1 + num2 ;
printf("Addition of %d and %d is %d\n", num1, num2, num3);
printf("\nDo you want to continue y(yes) or n(No)");
scanf(" %c",&ch);
if(ch=='y'){
goto yes;
}
else if(ch=='n'){
goto no;
}
else{
printf("You entered other key");
}
no : printf("Do you want to exit ?, Press Enter");
}

Enter two values
5
6
Addition of 5 and 6 is 11

Do you want to continue y(yes) or n(No)n
Do you want to exit ?, Press Enter

continue

void main(){
int i=0;
while ( i < 20 ){
printf("value of i is %d\n", i);
i++;
if ( i == 10 )
printf("Continued Values\n");
continue;
}
}

value of i is 0
value of i is 1
value of i is 2
value of i is 3
value of i is 4
value of i is 5
value of i is 6
value of i is 7
value of i is 8
value of i is 9
Continued Values
value of i is 10
value of i is 11
value of i is 12
value of i is 13
value of i is 14
value of i is 15
value of i is 16
value of i is 17
value of i is 18
value of i is 19

 

struct

struct Student {
char stud_name[30];
};
void main(){
struct Student info;
strcpy( info.stud_name, "Pradeep Rana");
printf( "Student name is %s ", info.stud_name);
}

Output :

Student name is Pradeep Rana

 

return

Number(){
int a=10, b=5, c;
c = a + b;
return c;
}
void main(){
printf("Addition of a and b is %d",Number());
}

Output :

Addition of a and b is 15

 

typedef

void main(){
typedef int num;
num num1;
printf("Enter value of num1 ");
scanf("%d", &num1);
printf("Value of num1 is %d", num1);
}

Output :

Enter value of num1 5
Value of num1 is 5

 

union

union Student {
char stud_name[30];
};
void main(){
union Student info;
strcpy( info.stud_name, "Pradeep Rana");
printf( "Student name is %s ", info.stud_name);
}

Output :

Student name is Pradeep Rana

 

const

void main(){
const int num=1;
printf("num = %d",num);
}

Output :

num = 1

 

enum

enum Days {Sun, Mon, Tue, Wed, Thu, Fri, Sat };
void main()
{
printf("%d, %d, %d, %d, %d, %d, %d",Sun, Mon, Tue, Wed, Thu, Fri, Sat);
}

Output :

0, 1, 2, 3, 4, 5, 6

 

sizeof

void main(){
printf("%d",sizeof(int));
}

Output :

4