ng-show
directive internally uses a method toBoolean
Here is how it looks like
function toBoolean(value) {
if (value && value.length !== 0) {
var v = lowercase("" + value);
value = !(v == 'f' || v == '0' || v == 'false' || v == 'no' || v == 'n' || v == '[]');
} else {
value = false;
}
return value;
}
If you look at the implementation, anything like no, false,n,0 evaluate to false.