boolean condition issue

Hi,

I was working one belw challenge

http://codingbat.com/prob/p178986

I wrote solution as below

public boolean hasTeen(int a, int b, int c) {
  if((13<=a<=19)){
  return true;
  }
   if((13<=b<=19)){
  return true;
  }
   if((13<=c<=19)){
  return true;
  }
  else return false;
}


I get error as below


Error:      if((13<=a<=19)){
         ^^^^^^^^^^^
The operator <= is undefined for the argument type(s) boolean, int


see Example Code to help with compile problems

Why i get above error. how to fix it. please advise
LVL 7
gudii9Asked:
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ozoCommented:
if(  13<=a && a<=19 ){
0
gudii9Author Commented:
How if(  13<=a && a<=19 ){

is different from

if((13<=a<=19)){

Please advise
0
gudii9Author Commented:
public boolean hasTeen(int a, int b, int c) {
  if((13<=a && a<=19)){
  return true;
  }
   if((13<=b && b<=19)){
  return true;
  }
   if((13<=c && c<=19)){
  return true;
  }
  else return false;
}


when i wrote as above all test cases passing
0
ozoCommented:
How if(  13<=a && a<=19 ){

is different from

if((13<=a<=19)){
The first is legal java code, the second is not

13<=a<=19  is interpreted as
(13<=a) <= 19
(13<=a) is a boolean, and 19 is an int,
trying to compare a boolean and an int with <= is invalid
0

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