Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error

clear all
close all
clc
tol=input ('Determine tolerance number:') ;
n=input('Determine iteration number:');
n=100; 
f=@(x) (x+1-2*sin(pi*x));
a=0; 
b=0.5; 
if f(a) * f(b)>0
    warning('ít is not applicable:')
    
elseif f(a)==0
    fprintf('The root is %d', a)
elseif f(b)==0
    fprintf('The root is %d', b)
end
pre=0;
for i=1:n
    c=(a+b)/2;
    if f(c)==0
        fprintf('The root is: %d\n' c)
    elseif f(c)*f(b)<0
        a=c;
    elseif f(c)*f(a)<0 
        b=c;
    end
    if abs(c-pre)<=tol
        break;
    end
    pre=c;
end
fprintf('The root is %g with the %.3d tolerance',c,tol)

Answer 1

[Walter Roberson]

        fprintf('The root is: %d\n' c)
                                   ^
                                   ^

You need a comma

[Jim Wilson Owusu]

Thank you very much . It worked