CODEWITHSUNDEEP
swiftswift4
senthil
senthil

Reputation: 75

find sum of all elements in array in swift 4

I have array like this 

let arr = [1,2,3,4,5,6,7,8,9,10]

I tried var totalSum = arr.map({$0.points}).reduce(0, +) but not worked

can I find all objects sum value?

Upvotes: 5

Views: 8787

Answers (3)

Shrikant Phadke
Shrikant Phadke

Reputation: 418

Without using any built in function.

let arr = Array(1...100)
var sum = 0

arr.forEach { (num) in
    sum = sum + num
}

Upvotes: 0

Jogendar Choudhary
Jogendar Choudhary

Reputation: 3494

This is the easiest/shortest method to sum of array.

Swift 3,4:

let arrData = [1,2,3,4,5]
sum = arrData.reduce(0, +)

Or

let arraySum = arrData.reduce(0) { $0 + $1 }

Swift 2:

sum = arrData.reduce(0, combine: +)

Upvotes: 3

Shehata Gamal
Shehata Gamal

Reputation: 100503

You need to drop the map & points 

let arr = [1,2,3,4,5,6,7,8,9,10]

let totalSum = arr.reduce(0, +)

print("totalSum \(totalSum)")

Upvotes: 13

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