The error is due to the square brackets that you used to denote a block for if condition. Square brackets are not required to denote a block in MATLAB.
if(Choice==1)
fprintf('i(t)=dq/dt\n')
coeff = input('Please enter the coeffecent before the e: ');
exp = input('Please enter the exponent ignoring the t variable: ');
coeff1 = coeff * exp;
fprintf('i(t) = %0fe',r1)
fprintf('^ %0t',exp)
elseif(Choice==2)
% Your code goes here
elseif(Choice==3)
% Your code goes here
elseif(Choice==4)
% Your code goes here
end
This code would probably help.
