please remove the if statement error

clc

syms h1 h2 h3 f1 f2 f3 fc1 fc2 fc3 L Lmax Lmin Lmid p1 p2 p3 
syms pload x xx xxx pi z up
h1 = 510+7.2*p1+0.00142*(p1^2)
h2 = 310+7.85*p2+0.00194*(p2^2)
h3 = 78+7.97*p3+0.00482*(p3^2)

fc1 = 0.9
fc2 = 1
fc3 = 1

f1 = h1*fc1
f2 = h2*fc2
f3 = h3*fc3

pload=850

L= 8

   x=diff(f1,p1)
   x=x-L
   x=solve(x)

xx= diff(f2,p2)
xx=xx-L
xx=solve(xx)

   xxx=diff(f3,p3)
   xxx=xxx-L
   xxx=solve(xxx)

   pi=x+xx+xxx

   e=pload-pi

   if(e<0.001)
        goto (53)
        return
    end

   if e>0
       L=1.1*L
       goto(20)
       return
   else
   L=0.9*L
   goto(20)
   return
    end

   Label 2
  L

Answer 1

[Walter Roberson]

What is goto() ? It is not a Mathworks provided function. MATLAB does not offer a GO TO construt.