MATLAB: How to print all prime numbers between 1 and 100 using a for loop

for loop

for f = (1:100)
    f
     isprime(f)
   j = all(f)  
end
fprintf('%j',j)
This is what I have, I either get j as logical or if I change it to "fprintf('%f', f)" I get f = 100.
I need to print the prime numbers.
What am I doing wrong?

Best Answer

num = 1:100 ;  % numbers till 100 
idx = isprime(num) ;   % get logical indices of prime numebrs 
num(idx)  % print the prime numbers 
ans = 1×25
     2     3     5     7    11    13    17    19    23    29    31    37    41    43    47    53    59    61    67    71    73    79    83    89    97
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