finding next prime number

function k=next_prime(n)
while true;
    n = n+1
    for i in rng(2:n):
        if mod(n,i) == 0
            break
        else
            return k
  #getting error
  Error in solution Line: 4 Column: 11
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

Answer 1

[Walter Roberson]

MATLAB does not use colon as a statment separator or statement terminator. You should remove it from the end of your for line.

Note: when the first parameter to the rng() function is numeric, then the parameter must be a scalar, not a vector of integers.

Note: the rng() function always returns a structure that gives information about the internal state of the random number generator. The mod() function will not accept that structure as the second parameter to mod().