Sir please explain once this

if (prime_count[i])
continue;

if( value) implies that if the value variable is anything other than 0 then in that u will not execute any other statement in the loop u simply use continue statement to skip all other expression
in prime_count[i] == 0 then this if condition will be false

so if() condition basically check if the value inside is non zero or zero
and then executes accordingly

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