Are the following if statements equivalent? If not, why?

$(1)$

if$($score $>=90)$

printf$("$A$")$;

else if$($score $>=80)$

printf$("$B$")$;

else if$($score $>=70)$

printf$("$C$")$;

else if$($score $>=60)$

printf$("$D$")$;

else

printf$("$F$")$;

$(2)$

if$($score $<60)$

printf$("$F$")$;

else if$($score $>=70)$

printf$("$D$")$;

else if$($score $>80)$

printf$("$C$")$;

else if$($score $>90)$

printf$("$B$")$;

else

printf$("$A$")$;