# Is String function family inherently dangerous? **URL:** \ **Category:** Programming\ **Created:** [November 29, 2018, 5:17am UTC](https://forum.arduino.cc/t/is-string-function-family-inherently-dangerous/559303 "2018-11-29T05:17:21Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![KASSIMSAMJI](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/kassimsamji/32/261751_2.png) [@KASSIMSAMJI](https://forum.arduino.cc/u/KASSIMSAMJI)\ **Post date:** [November 29, 2018, 7:41am UTC](https://forum.arduino.cc/t/is-string-function-family-inherently-dangerous/559303/11 "2018-11-29T07:41:29Z")
> sherzaad: > I think that is the keypoint. Rather than saying "String is Evil on Arduino", I think if a general rule like > "_if dynamic memory used is more than x% of total memory available then String is not advisable_" > it would be more useful. > > but how to define 'x' is beyond me... i am pretty sure 'x' should be 50 or less then you are way safer, actually i have couple of projects on site running on Arduino Mega 2560, with bunch of Strings in it, dynamic mem. reads 30% upon compiling and never had issues for months (6+) now while being on site played with couple of ESP8266 , never used a single char pointer/array in it and the dynamic mem. reads 31% upon compiling, bunch of bunch of Strings are in there and never had issues with it I once tried to go for 'string' ( lower case 's' ) in nano+sim800L related project , tested it with 'receiving sms' and displayed it on serial monitor' which worked pretty well for couple of minutes , then , sms was displayed truncated , in short the use of 'string' was not that reliable at all, i gave up,went back to old time friend 'String' --- _[View the full topic](https://forum.arduino.cc/t/is-string-function-family-inherently-dangerous/559303)._