Pow (Swift)

Question

var a = 2, b = 3
//(a+4b)(a–3b)+a^2
var res = (a + (4 * b)) * (a - (3 * b)) + pow(Double(a),2)

print(res)

//I do not know how to square, for some reason the answer is not displayed

Answer 1

This one

import Foundation
var a = 2, b = 3
//(a+4b)(a–3b)+a^2
var res = (a + 4 * b) * (a - 3 * b) + Int(pow(Double(a),2))
print(res)

Becomes - 94
Don't know if you need a Integer Result, or a Double Result

Answer 2

Wow , thank you very much!!!!🎉

Answer 3

Try: import Foundation
I've tested this, and it's running

import Foundation
var res = pow(5.0,2)
print(res)

https://stackoverflow.com/questions/24012511/mathematical-functions-in-swift

Answer 4

And why here 5.0?

Answer 5

Only for testing. I don't know anything about Swift

Answer 6

But this is also working:

import Foundation
var a = 5
var res = pow(Double(a), 2)
print(res)

Answer 7

Yes it works, but for some reason it doesn't work for me in the equation (

Answer 8

Hmm, looks like another issue. 🤔

Answer 9

Viktor Kizera Your'e welcome.