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How to add string to string ?

How to add string to string ?How to add two integers ?



Asked On2019-06-18 16:25:47 by:gokilapriya

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Answers

The simplest way to concatenate two or more string variables is to write them one after another:

VAR1="Hello,"
VAR2=" World"
VAR3="$VAR1$VAR2"
echo "$VAR3"
Copy

The last line will echo the concatenated string:

Hello, World
Copy

You can also concatenate one or more variable with literal strings:

VAR1="Hello, "
VAR2="${VAR1}World"
echo "$VAR2"
Copy
Hello, World
Copy

In the example above variable VAR1 is enclosed in curly braces to protect the variable name from surrounding characters. When the variable is followed by another valid variable-name character you must enclose it in curly braces ${VAR1}.

To avoid any word splitting or globbing issues you should always try to use double quotes around the variable name. If you want to suppress variable interpolation and special treatment of the backslash character instead of double use single quotes.

Bash does not segregate variables by “type”, variables are treated as integer or string depending on contexts. You can also concatenate variables that contain only digits.

VAR1="Hello, "
VAR2=2
VAR3=" Worlds"
VAR4="$VAR1$VAR2$VAR3"
echo "$VAR4"
Copy
Hello, 2 Worlds
Copy
VAR1="Hello, "
VAR1+=" World"
echo "$VAR1"
Copy
Hello, World
Copy

The following example is using the += operator to concatenate strings in bash for loop:

languages.sh
VAR=""
for ELEMENT in 'Hydrogen' 'Helium' 'Lithium' 'Beryllium'; do
  VAR+="${ELEMENT} "
done

echo "$VAR"
Copy
Hydrogen Helium Lithium Beryllium
ADD 2 INTEGERS
This example will help you to understand to add two numbers in the bash script. This script takes the input of two numbers from the user and prints the sum of both numbers.

This is an example script initializes two variables with numeric values. Then perform an addition operation on both values and store results in the third variable.


Answerd on:2019-08-30 Answerd By:Tanisha-Garg

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