if greater than in for loop

using a for loop and if statement, i need to subtract 25 from each element in a vector called "seven" that is greater than 100.

here is my code, but when i run it i get the original values of all elements in seven. how can i fix this?

for k = seven
    if k > 100
        k - 25
    else
        k + 0
    end
end

Answer 1

[KSSV]

for k = 1:length(seven)
    if seven(k) > 100
        seven(k) = seven(k) - 25 ; 
    end
end

[Eliana Juarez]

Thank you so much!

Answer 2

[Rafael Hernandez-Walls]

seven=(seven>100).*(seven-25)+(seven<=100).*seven;