c - What is the purpose of surrounding a code block between glBegin and glEnd in brackets? -

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what purpose of surrounding code in between call glbegin , glend in brackets? have programmatic or functional purpose or aesthetics , style? code below in c.

glbegin(gl_polygon); glcolor3fv(green); glvertex3fv(block_vertices[0]); glvertex3fv(block_vertices[1]); glvertex3fv(block_vertices[2]); glvertex3fv(block_vertices[3]); glend();

versus

glbegin(gl_polygon); {     glcolor3fv(green);     glvertex3fv(block_vertices[0]);     glvertex3fv(block_vertices[1]);     glvertex3fv(block_vertices[2]);     glvertex3fv(block_vertices[3]); } glend();

the reason style, because somehow feels right programmer wrote it.

it might have made sense if he/she introducing local variables (i.e. looping create vertices), in c99 , later that's not necessary either.


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