Find square and square root for a given number in C

This simple C program shows how to find square and square root for a given number.

#include <math.h>   /* for sqrt() function */
#include <stdio.h>
int main()
{
    /* variable named x with floating-point data type */
    float x;
    /* standard output  writing a positive floating number */
    printf("\nEnter one positive number (1, 2, 3. . .): ");
    /* standard input reading floating number */
    scanf("%f", &x);
    printf("\nx = %f ", x);
    printf("\nSquare for x is = %f", x * x);
    // sqrt() is the predefined function, defined in math.h
    printf("\nSquare root for x is = %f\n", sqrt(x));
    return 0;
}