Variable: variable type variable name variable value
1b 1B
=: the
left side of the assignment number must be the variable name, and the right side is an expression
system automatically calculates the value of the right expression, and then places it in the memory space pointed to by the variable on the left in
a = a + 200;
Baidu oriented programming
between the symbols and the amount of the left and right, a lattice space to
1TB = 1024GB 1024M 1GB = 1MB = 1024KB 8BIT 1KB = 1024B. IB =
{} must be paired
// member variables
Int a; Each line must be a statement, and the statement is used; the end local variable
a=100//100 defaults to int type occupies four bytes.
If 300 is followed by
"Number3="+number3
string constant + 30 (int) automatic conversion
" Number"+"30" "Number=30"
5.12 e -9
mantissa exponent