read05.md

Comparison and Looping

1. Comparison & logical operators

Comparison operators are a non-alphabetic characters. they may consist of one, two or three stringed characters. They are used to construct one expression that compare between two values which is referred by a condition. The form of a condition must be one operator and two operands. The operand must place in each side of the operator.

The condition is a comparing between two values so; the ending result is a Boolean datatype value (either yes or no). the comparisons operators are:

operator	function
==	do values are equal each other ?
===	do values and datatypes are equal each other ?
!=	do values are not equal each other ?
!==	do values and datatypes are equal each other ?
<	does the left value is less than the right value
<=	does the left value is less than or equal the right value
>	does the left value is greater than the right value
>=	does the left value is greater than or equal the right value

Logical operators are characters too and they are:

operator	function
&&	and
`
!	logical not

They are used to connect between two conditions or more:

They are used for comparing the conditions results as follows (T:true , F:flase):

2. Looping

Loops are codes repeat running their inside instructions (statements) as long as the loop condition is true. Loops are consist of three parts:

part	description	script
initialization	the initial value for the condition variable	var i = 1
condition	the condition variable compared with a limit	i <= 10
update	the new updated value for the condition variable	i++

Some of these loop scripts are:

loop	script	flow chart
for	for (i=1 ; i<= 10 ; i++) { console.log(i); }	for
while	while (i<= 10) { console.log(i); }	while

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