Wihle loop not running

x1=0:5; %tank1 capicity 
x2=0:10; %tank2 capicity 
x3= 0:1000000; %tank3 capicity 
y1=2 %L/min pipe 1 
y2=1 %L/min pipe 2 
y3=0.5 %L/min pipe 3
v1=0 ; 
while (v1<5) 
v1=x1+y1;
end

why my loop is not running well.I get v1 6 and 7 even when my condition v1 < 5

Answer 1

[Torsten]

At first (by your setting) v1 = 0. Thus the while loop is entered.

After entering the while loop, v1 becomes x1 + y1 = [2 3 4 5 6 7], an array of numbers.

After this, MATLAB exits the while loop because not all elements of v1 are < 5 (that's what v1 < 5 for a vector means: all elements must be < 5)

Everything as expected.