BATCH SCRIPTING// IF CONDITION // Batch Scripting Part -16- IF CONDITION
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Title: BATCH SCRIPTING// IF CONDITION // Batch Scripting Part 16 IF CONDITION
In this lesson, you will be learning about IF CONDITION for Batch Script.
IF CONDITION: The first decision-making statement is the ‘if’ statement. The general form of this statement in Batch Script is as follows −
if(condition) do_something
One of the common uses for the ‘if’ statement in Batch Script is for checking variables which are set in Batch Script itself. The evaluation of the ‘if’ statement can be done for both strings and numbers.
Checking Integer Variables
The following example shows how the ‘if’ statement can be used for numbers.
Example
@echo off
SET /A a = 5
SET /A b = 10
SET /A c = %a% + %b%
if %c%==15 echo "The value of variable c is 15"
if %c%==10 echo "The value of variable c is 10"
OUTPUT
"The value of variable c is 15"
Checking String Variables
The following example shows how the ‘if’ statement can be used for strings.
Example
@echo off
SET str1 = String1
SET str2 = String2
if %str1%==String1 echo "The value of variable str1 is correct"
if %str2%==String3 echo "The value of variable str2 is correct"
Output
The above command produces the following output.
"The value of variable str1 is correct"
Note − One key thing to note is that the evaluation in the ‘if’ statement is "case-sensitive”. The same program as above is modified a little as shown in the following example. In the first statement, we have changed the comparison criteria. Because of the different casing, the output of the following program would yield nothing.
@echo off
SET str1 = String1
SET str2 = String2
if %str1%==String1 echo "The value of variable str1 is correct"
if %str2%==String2 echo "The value of variable str2 is correct"
Output
The above command produces the following output.
"The value of variable str2 is correct"
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