Counting Characters in a String in Swift with Loop

Question

I'm trying to loop through a string and count its characters in Swift. This code successfully outputs the character count, but I receive this warning:

warning: immutable value 'character' was never used; consider replacing with '_' or removing it for character in quote { ^~~~~~~~~ _

This is my code:

var quote = "hello there"
var count = 0

for character in quote {
  count = count + 1
}
print("\(count)")

Does anyone know why I have this warning? Also, is this the best way to approach this task? Thanks.

Alexander · Accepted Answer · 2020-05-01 17:52:54Z

2

Please read the error message carefully, it tells you precisely what's wrong and what you can do.

immutable value 'character' was never used

That's indeed true, the variable character is unused. The compiler provides two fixes:

consider replacing with '_' or removing it

The latter is not an option in a loop, so use the first, replace character with an underscore

for _ in quote {

edited May 1, 2020 at 17:52

Alexander

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answered May 1, 2020 at 17:41

vadian

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