This statement jumps to one of the indicated label 's or lineNum 's, according to the value of expr. If expr equals 1, then the program jumps to label1 or lineNum1; if expr equals 2, then the program jumps to label2 or lineNum2, and so on. If expris less than 1, or greater than the number of label 's and lineNum 's in the list, then the ON <expr> GOTO statement does nothing.