Help with Syntex of an ESC command for printer

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good day,

im still kind of new c++ coding , use hand formatting line of code. have thermo printer adafruit. need darken print , there esc command need send printer via serial3 hardware port on mega 2560 controller. according manual need send
"esc 7 n1 n2 n3". n1 - n3 can assigned value of 0 - 255.

so far have tried    serial3.print (esc 7 7 150 60). resulted in "esc not declared in scope".
so. declared "int esc = 27". gives me "expected ')' before numeric constant".

could me on right track.

thanks
paul

try putting double quotes around string

"this string"

if want have weird characters in string such escape can't type, investigate \xxx notation



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