echo
is a statement, which is used to display the output.
For instance :
echo "Hello world! ";
echo "I am Prgorammer, ","I have no life."." Hola muchachos:))";
The text must be enclosed in single ( ' ' ) or double ( " " ) quotation marks and must also end with a semicolon ( ; ) .
Also, the echo statement can output multiple strings separated by commas and dots.
! PHP statements end with semicolons (;).