Error: Expression or statement is incomplete or incorrect.

the error will be occur in this code portion

% check if an RGB color is in the +/-30 range of rgb(100, 110, 120)
R = 128;
G = 100;
B = 220;
result = R > 70 && R < 130 &&
         G > 80 && G < 140 &&
         B > 90 && B < 150;

Answer 1

[Star Strider]

Use continuation ellipsis (dots):

R = 128;
G = 100;
B = 220;
result = R > 70 && R < 130 && ...
         G > 80 && G < 140 && ...
         B > 90 && B < 150;

See the documentation on Special Characters [ ] ( ) {} = ' . ... , ; : % ! @ (link) for informaiton on this and others, and specifically Continue Long Statements on Multiple Lines.