Electric current has both magnitude and direction. But it is a scalar. If it is assumed as vector quantity, then :

current doesnot obey laws of vector addition. As current is a scalar quantity the law of conservation of charge holds goodAccording to vector addition, if current is a vector i=i21+i21+2i1i2cosθAs cosθ lies between -1 and +1i1-i2≤i≤i1+i2Q1-Q2≤Q≤Q1+Q2from above equation charge is not conserved as current entering junction is not equal to current leaving the junction