Problem in writing For loop

#1

please can someone can explain what is ::
for(auto i:adjList) and also please explain same kinda syntax??

#2

Range-based for loop in C++ is added since C++ 11. It executes a for loop over a range. Used as a more readable equivalent to the traditional for loop operating over a range of values, such as all elements in a container.

Syntax :

for ( range_declaration : range_expression )
loop_statement

Parameters :
range_declaration :
a declaration of a named variable, whose type is the
type of the element of the sequence represented by
range_expression, or a reference to that type.
Often uses the auto specifier for automatic type
deduction.

range_expression :
any expression that represents a suitable sequence
or a braced-init-list.

loop_statement :
any statement, typically a compound statement, which
is the body of the loop.

#3

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