Q1 Explain functions with an example :
scanf(), printf(), pow(), getch()
scanf() function is used
to take input from the user through keyboard.
#include <stdio.h>
void main()
{
int testInteger;
printf("Enter an integer: ");
scanf("%d", &testInteger);
printf("Number = %d",testInteger);
}
printf() function is used
to display output on the screen to the user.
#include <stdio.h>
void main()
{ int testInteger = 5; float number1 = 13.5; char chr = 'a';
printf("Number = %d", testInteger);
printf("number1 = %f\n", number1);
printf("character = %c.", chr);
// Displays the string inside quotations
printf("C Programming");
}
pow() function is used
to get power of a value i.e. c = ab
Syntax
of pow()
in C language, double pow(double
val1, double val2);
#include<stdio.h>
#include<math.h>
void main() {
double x = 5.0;
double y = 4.0;
double p;
p = pow(x, y);
printf("The value : %lf", p);
}
getch() function is used
to take input a character from the user through keyboard without echo. It can be used to hold program execution.
#include <stdio.h>
void main()
{
/* Our first simple C basic program */
printf("Hello World! ");
getch();
}