I need know what's error, I help me please..

Question

var arr = ["Louis", "Martha", 20, 35, "Jhon", 70];

function comprobar(){

switch(arr){
case arr[0]:
if(isNaN(arr[0])){
alert(arr[0] + " No es un nunero");
}
else{
alert("Es un nunero");
}
break;

case arr[2]:
if(isNaN(arr[2])){
alert(arr[2] + " Es numero");
}
else{
alert("No es un nunero");
}
break;
}
}
comprobar();

Answer 1

If you want to do iteration to check for each value of the array, you should use for instead of switch statement. Switch cannot do iteration, only for checking a value.

Try this:

var arr = ["Louis", "Martha", 20, 35, "Jhon", 70];

function comprobar(){
for(var i=0;i<arr.length;i++) {
if(isNaN(arr[i])){
alert(arr[i] + " No es un nunero");
}
else{
alert(arr[i] + " Es un nunero");
}
}
}
comprobar();

https://code.sololearn.com/W19vbD5REESy/?ref=app

Answer 2

you compare an array with its elements, arr is not equal to arr[0] and is not equal to arr[2], so nothing is output

Answer 3

thanks friend for help me