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How to assign value after increment Swift?

var str = ["Franc": 2]
var a = 1
str["Franc"] = a += 1
print(str)

When I try this code i get an error on line "str["Franc"] = a += 1" that is "Cannot assign value of type '()' to type 'Int?'" How to solve this. I need it in single line Thank you in advance

Solution

  • We can do this directly only in Objective C:

    In Objective C:

    [str setValue:[NSNumber numberWithInt:a+=1] forKey:@"Franc"];

    In Swift

    str["Franc"] = a
a += 1