What is void in C? tccicomputercoaching.com

What is void in C? tccicomputercoaching.com The meaning for the word “void” is “nothing or completely empty”. This term plays a vital role in computer programming. The most familiar uses are:

1. Void as a Function Return Type 2. Void as a Function Parameter 3. Void as a Pointer Declaration Examples: 1. Void as a Function Return Type void maxval (int a,int b); void main() { int x=6,y=10; clrscr(); maxval(x,y); getch(); }

void maxval(int a,int b) { if(a>b) { printf("\na=%d is greater value",a); } else { printf("\nb=%d is greater value",b); } } 2. Void as a Function Parameter

int sum(void); //function declare//

void main() { int ans; clrscr(); ans= sum(); printf("%d",ans); // printf("ans is %d", sum()); //function call// getch(); } int sum(void)//function defintion// { int a,b,c; printf("enter the value of a,b");

scanf("%d%d",&a,&b); c=a+b;

return c; // printf("\n your addition is=%d",c); } 3. Void as a Pointer Declaration 1.

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int main() { int a = 10; void *ptr = &a; printf("%d", *(int *)ptr); return 0; } 8. OUTPUT: 9. 10

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