finding the max ?

i have a vector x=[-1,5,3,4,5]

i want to calculate the max of the vector x and its position using the loop for, i want also to extract the two position here we have max =5, the first position is i1=2 and the second i2=5, how can i do this, can anyone help me ?

Answer 1

[Guillaume]

maxvalue = max(x);
positions = find(x == maxvalue);

No loop needed

[diadalina]

thank you mr,Guillaume, i founde it,