Strong vs weak typing in programming

Example

	Weak Typing	Strong Typing
Pseudocode	a = 2 b = "2" concatenate(a, b) # Returns "22" add(a, b) # Returns 4	a = 2 b = "2" concatenate(a, b) # Type Error add(a, b) # Type Error concatenate(str(a), b) # Returns "22" add(a, int(b)) # Returns 4
Languages	Perl, PHP, Rexx, JavaScript, BASIC	Java, C, C++, Python, C#, Vala