square in c

1#include <math.h>
2int main()
3{
4	float number;
5  	square = pow(number,2); //This returns number raised to the power 2
6  	printf("The square of %f is %f", number, square);
7  	return 0;
8}

1#include <stdio.h>
2int main()
3{
4	float number;
5	printf("Enter a number: ");
6	scanf("%f", &number);
7	square = number * number;
8	printf("square of the given number %f is %f", number, square);
9	return 0;
10}

1double sqrt(double arg);