Should i learn guitar scales before learning chords?

you should learn chords first. they are ultimately built from scales so it’s like you’re learning both. learn scales when you want to learn solo’s and understand how music is put together.
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I don’t know the guitar not that much, but I learned with cords first.
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Learn scales, definitely.
Scales will give you a feel for the neck and teach you to pick each string.
Chords will be easier after you learn a few scales.
And make sure that one of the scales you learn is the pentatonic minor.
After you know 3 to 5 scales, go on to chords.
Learn chords in groups. The I V IV is the standard progression. Learn the chords together like that.
Example:
A – A D E
E – E A B

Most guitarists learn to solo in either A or E, and whatever you learn first will always be the most comfortable for you after that. The first few scales you learn should be in either A or E (unless you want to go modal).

EDIT:
Here’s an edit for people that say you can’t play songs with a scale.

The scale is E pentatonic minor.

e: 10, 12
B: 8, 10, 12
G: 7, 9
D: 5, 7, 9
A: 5, 7
E: 0, 3, 5, 7

The song is "Oh Well" by Fleetwood Mac. http://www.youtube.com/watch?v=KE4HGlmtOcg
Play it on the low E and the A strings.
E open is the root (R). E at the 3rd fret is the 3rd; at the 5th fret is the 4th; and at the 7th fret is the 5th. On the A string, the 5th fret is the 7th, and the 7th fret is again the root.
The (E) here is an E chord

e: x
B: x
G: x
D: 2
A: 2
E: O

Here’s the riff:
R 3 R 4 5 7 / 5 4 3 / R E E
R 3 R 3 4 7 / 4 5 R / R E E
R 3 R 4 5 7 / 4 5 4 3 / R E E
R 3 R 4 5 7 R 7 5 4 3 R E E

The slash behind the number shows you the quarter notes.
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I’ve always felt that it is better to start with chords. While it’s true that chords are based around scales, you can’t play a song with scales. As an analogy, you might think of learning to play guitar the way a baby learns to speak. Notes and scales are the alphabet….chords are like words, and songs are like complete sentences. When a baby learns to talk, it doesn’t know much about the alphabet. It’s learning to pronounce basic words and string them together to make sentences. Later in school, the child can learn the alphabet, how to spell, and read.

Our adult brains do have the capacity to learn scales first and build in a logical progression from notes to scales to chords. You *can* learn scales first but as a practical matter it’s a longer process before you can actually play anything. Yes, you’ll hear how every solo is based around scales, and there are people who completely skip over chords, learn a few solos and think they are rock stars. Here’s a tip: nobody but other guitar geeks cares about listening to their solos. The average listener is paying attention to the words and overall melody of a song. Look how popular Taylor Swift is….and all she plays are a few chords.

Here’s the magic of chords: Once you memorize a few chords, you can sing and accompany yourself…or others….on thousands of songs. So within a week or so of starting to play, you can actually be making music. There’s no harm working on scales concurrently with chords, but chords will get you up and playing much faster. The sooner you can actually play a song, the sooner you’ll be over the hump and hooked on guitar. Then you can get to the boring (but necessary) stuff like scales. Best of luck to you.
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Playing guitar for 46 years, pro guitarist

You need to learn both. They work hand in hand with each other. Start learning the Key of C first, i.e. Learn the chords in the Key of C, and also the C major scale. And also get familiar with the key of G as well.
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16+ years experience.