School Uniforms

Why should schools have uniforms? Students hate school uniforms they see no point in having school uniforms but we need school uniforms so that students will not make them selves look inappropriate for school.
In my mind I say school uniform should be in every school  so that students will look presentable for visitors and have them get used to being in uniform so if/ when ever the students get a job that they need to wear uniforms they will not have any problems with wearing uniforms.

Why shouldn't students wear school uniforms? Students should not wear school uniforms for the simple fact that students do not like uniforms and think that uniforms should not be in any schools.