I keep getting this error from my code, I dont know why ive tried to fix it many times but it did not work

if ( d == false ) {
if ( x == false ) {
num1 = 1;
}
else {
num2 = 1;
}
else {
if ( x == false ) {
num1 = num1 + e
e = e * 10
}
else {
num2 = num2 + e
e = e * 10
}
}
}