What are the advantages of Scanner Class? Explain.

Correct the errors of the given program:

class Sample
{
public static void main(String args[])
{
int n,p;
float k,r;
n=25;p=12; 
if(n=25)
{
k=pow(p,2)
System.out.println("The value of"+p+ "= "+k);
}
else
{
r=Math.square root(n); 
System.out.println("The value of"+n+ "= "+r);
} 
} 
}

Write down the syntax with reference to Java Programming:

to accept an integral value