How to calculate division remainder using modulo
Swift version: 5.1
Swift has a dedicated remainder operator in the form of %, and it’s used to return the remainder after dividing one number wholly into another. For example, 14 % 3 is 2, because you can fit four 3s into 14, and afterwards you have the remainder 2.
The remainder operator is helpful for calculating things like odd and even numbers – if you want alternate rows of your table to be a slightly different color, for example, you might write this:
for i in 1...10 {
if i % 2 == 0 {
print("Number is even")
} else {
print("Number is odd")
}
}You can also use the isMultiple(of:) method, which does more or less the same thing while being more readable:
for i in 1...10 {
if i.isMultiple(of: 2) {
print("Number is even")
} else {
print("Number is odd")
}
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Available from iOS 8.0
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