#!/bin/bashn=9999for(( i =1; i<=100;i++))do/root/testProgram$nsleep5 n=$((n+1))done REFER:How to increment a variable in bash?
In this section, I will be sharing examples of both incrementing and decrementing a variable. Here, I will be using double parentheses syntax for the increment example whereas let command for decrement. Incrementing a variable: In this example, I have used an until loop which will increment t...
The loop structure is incomplete without the increment or decrement. There are various methods to implement increment and decrement in the while loop. Using Round Brackets (( )) UsingletCommand The simplest way to add increment or decrement is using the round brackets with variable-name and ++ ...
By incrementing a variable each time the loop is executed, the commands can be run a specific number of times: n=1 while [ $n -le 10 ] do echo "$n" n=$(( $n + 1 )) done The true command can be used to create an infinite loop: while true ## : can be used in place of...
There is no good reason to use an external command such as seq to count and increment numbers in the for loop, hence it is recommend that you avoid using seq. The builtin command are fast. Three-expression bash for loops syntax
forvariablein1 2 3... ndocommand1 command2done The second notation uses theforloop with a three-expression like in the C programming language.exp1is the initialization,exp2is the condition, andexp3is the increment. for((exp1;exp2;exp3))docommand1 command2done ...
forItemin$(Command)doSome Operations on Itemdone When a command is used with theforloop, theItemvariable will be assigned with each of the output tokens one by one. For example, the following script will print all the files or folders starting withfin the current directory using theforloop...
command1 on $VARIABLE command2 commandN done 1. 2. 3. 4. 5. 6. OR for OUTPUT in $(Linux-Or-Unix-Command-Here) do command1 on $OUTPUT command2 on $OUTPUT commandN done 1. 2. 3. 4. 5. 6. Examples This type of for loop is characterized by counting. The range is specified ...
Example 1 - for Loop to Read Input Variable Using the for loop, it is straightforward to read the predefined strings or array. Here is an example of how you can use the for loop. In the example, we will take the input value of a text that has multiple words that will be taken afte...
Bash FOR loop syntax The FOR loop is one of the most straightforward loops that cause iteration to a set of variables, the general syntax of for loop is given below; for VARIABLE in 1 2 3 4 5 .. N Run the below command: command1 ...