String Builder doubt

#1

Can we use string builder every time ,is there any complexity increase in my program or any cons of use of string builder every time???

#2

HI @Abbas786,
StringBuilder is mutable, while String is immutable. Immutable means it doesn’t change.In other words like array we cannot do String str; and then str[i]=‘a’; we cannot modify the value of string and we add two strings then actually we create a third string containing string one + string two . While in case of string builder you can modify str[i]=‘a’ or stating it otherwise you can change the value of index i in string builder. String is way more efficient if you do not want to use these extra feature

#3

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