comparing multiple variables at same time in javascript

Question

These are my variables.

value1= 15.8
value2 = 15.5
value3 = 15.3

My condition is, value1 should be greater than value2 and value2 should be greater than value3.

yes, I can achieve this through console.log( (value1 > value2) && (value2 > value3));

I tried, console.log( (value1 > value2 > value3)); It looks like fine for me, but it returns false. I want to know whether I can compare three or more variables like this, if yes what I missed here.

Thank you.

No, it's not possible. The comparison operators are binary - they only operate with two values at a time. You can only make a series of binary comparisons. — VLAZ
– VLAZ, Commented Dec 13, 2019 at 8:42
value > value2 > value3 will parse as true > value3 which forces true to be evaluated as a number giving you 1 > value3 which is false — slebetman
– slebetman, Commented Dec 13, 2019 at 8:45

Rajesh Dixit · Accepted Answer · 2019-12-13 08:49:38Z

1

whether I can compare three or more variables like this

Simple answer, No.

When you do

value1 > value2 > value3,

its will be parsed from left to right and will look like (value1 > value2) > value3

value1 > value2: This will yield boolean value, say true
true > value3: This will always yield false, unless value3 is less than 1 as rightly suggested by slebetman

When values are compared, JS will try to bring them to same type. So boolean value will be converted to numeric value.

true -> 1
false -> 0

edited Dec 13, 2019 at 8:49

answered Dec 13, 2019 at 8:44

Rajesh Dixit

25k5 gold badges52 silver badges86 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

slebetman Over a year ago

value3 does not need to be zero. Just less than 1. true > 0.9 is true and true > -100 is also true. This is because new Number(true) gives you 1

Ele · Accepted Answer · 2019-12-13 08:49:15Z

1

I tried, console.log( (value1 > value2 > value3)); It looks like fine for me, but it returns false.

okay consider how it's evaluated first value1 >value2 is compared which is true,

after that true > value3 is compared which is false.

I want to know whether I can compare three or more variables like this

in this case it will be evaluated from left to right, with result left condition to right variable or expression value

edited Dec 13, 2019 at 8:49

Ele

33.8k7 gold badges43 silver badges80 bronze badges

answered Dec 13, 2019 at 8:45

Jatin Parmar

2,9596 gold badges22 silver badges34 bronze badges

Collectives™ on Stack Overflow

comparing multiple variables at same time in javascript

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related