If coordinate of point P is (2, 3, 4) then $\overrightarrow{OP}$ vector is

$\overrightarrow{OP}=$Position of P-Position of O

$= 2\hat{i} + 3\hat{j} + 4\hat{k} - (0\hat{i} + 0\hat{j} + 0\hat{k})$

$=2\hat{i}+3\hat{j}+4\hat{k}$

we know, position of point (a, b, c) is $a\hat{i} + b\hat{j} + c\hat{k}$.