Print the result of an intermediate computation:

Print an intermediate result using a label:

Report a property of an intermediate result:

Echo[…] can be used as an argument to other functions because Echo returns its first argument:

Mix Echo and Print statements:

Use Echo with any type of expression:

Print a property of a subexpression:

Observe the order in which Cases visits parts of an expression at level 1:

At all levels:

Echo returns the expression in its first argument:

Print returns Null:

EchoFunction is an operator form of Echo:

EchoLabel is an operator form of Echo:

EchoTiming can be used to print the timing of intermediate computations without affecting the result:

Echo can also be used to print the timing, but at the cost of doing the computation twice:

Echo prints the evaluated expression:

Use Unevaluated to print the unevaluated expression:

EchoEvaluation prints the expression before and after evaluation:

Echo is disabled inside QuietEcho: