GATE Mechanical Engineering (ME) 2023 Shift 1 Solved Paper

The initial value problem
$\frac{\mathit{d}\mathit{y}}{\mathit{d}\mathit{t}}+2\mathit{y}=0,\mathit{y}\left(0\right)=1$
is solved numerically using the forward Euler’s method with a constant and positive time step of Δt. 
Let 𝑦_𝑛 represent the numerical solution obtained after 𝑛 steps. The condition |𝑦_n+1| ≤ |𝑦_n| is satisfied if and only if Δt does not exceed _____________.
(Answer in integer)