how to write code for is_integer() method?

Answer 1

above is correct
but u have to check also if all the caracters it has are numeric and that it doesnt contain any non-numeric caracters
so the thing u have to check is:
-all caracters are numeric (so it is a number)
and the moments all caracters are numeric then no floating point exist (thus u dont have to check the floating condition..)

Answer 2

it simple an integer is a number with no decimal , u can either check for the decimal (floating point)
If the number has a floating Point then it is not an integer
Simple using string functions like inStr() and mid()

Answer 3

Just do this....

//let say the input is in String
public boolean is_integer( String num )
{
//try to convert to Integer, if it is successful, then it is an integer
try {
int temp = Integer.parseInt( num );
System.out.println( num + " is an Integer!" );
return true;
} catch( NumberFormatException e)
{
System.out.println( " It is not Integer" );
return false;
}
}

/** OR **/

// Let say you are evaluating a String object
public boolean is_integer( )
{
//try to convert to Integer, if it is successful, then it is an integer
try {
int temp = Integer.parseInt( this );
System.out.println( temp + " is an Integer!" );
return true;
} catch( NumberFormatException e)
{
System.out.println( " It is not Integer" );
return false;
}
}

Answer 4

too vague, need more info about function inputs, outputs, pre-conditions, post-conditions, etc. I can't read your mind.

Answer 5

I think this is a php-question.
So you should use php.net.