graph bars with erro bars

[abdelilah arredouani]

hi all,
I have 45 continuous variables with 500 observations. i have been reading about creating graph bars with error bars (std or SEM) but i am bit overwhelmed by the many propositions from statlist members, which don't seem intuitive for me (just started learning stata). can you please help me with a simple code that will calculate the mean and the SD or SEM, plot bars with SD or SEM or CI.
i have the simple code below that allows me to graph the mean of some variables (20 observations) but i want to add the SD.

foreach var in bodyfatbmi-chlorideact {
sum `var'
graph bar `var'
}

thanks in advance

Stata 15.1 on mac

[Marcos Almeida]

You may wish to read about - serrbar - command.

[Nick Cox]

Your graph suggests that your variables are, unsurprisingly, on quite different scales (units of measurement and differing level and spread. For 45 variables you need to think about strategy, as 45 variables in one graph won't work and 45 graphs is not an especially good idea either.