Why can't we use '=' operator in these statements ?

Question

When I tried that, it gave me a syntax error

Answer 1

hi,
what language do you use (python, JS...) ?

basic syntax is usually :
if (... some condition ...)
{...code to execute if True...} ;

in condition you can use something like :

x==1 (comparaison operator)

it's better than :
x=1 (assignation operator who will always true or always false)