#!/bin/bash echo 'read_input=?' ; read read_input echo "Welcome on $read_input"
read_input=?
Devinline
Welcome on Devinline
#!/bin/bash echo 'Enter input value N=?' ; read N x=0 #no space in variable declaration zero=0 t=9 while [ $x -le $N ] do let p=$x%2; if [ $p -eq 0 ] then echo "$x" fi x=$((x+1)) done
[cloudera@quickstart Desktop]$ sh even.sh
Enter input value N=?
15
0
2
4
6
8
10
12
14
3. Print 1 to N (N is read as user input)
#!/bin/bash x=1 echo 'Enter input value N=?' ; read N while [ $x -le $N ] do echo $x x=$((x+1)) #Arithmatic compound expression done
Enter input value N=?
8
1
2
3
4
5
6
7
8
4. Arithmetic operation - read two number from user and perform addition, subtraction, multiplication and division
#!/bin/bash echo 'Enter input value1 x=?' ; read x echo 'Enter input value2 y=?' ; read y echo "Sum is $((x+y))" echo "Subtraction is $((x-y))" echo "Multiplication is $((x*y))" echo "Division is $((x/y))"
Enter input value1 x=?
12
Enter input value2 y=?
4
Sum is 16
Subtraction is 8
Multiplication is 48
Division is 3
5. Compare two number entered as user input (If-else block)
#!/bin/bash echo 'Enter input value1 x=?' ; read x echo 'Enter input value2 y=?' ; read y if [ $x -gt $y ] then echo "X is greater than Y" elif [ $x -lt $y ] then echo "X is less than Y" else echo "X is equal to Y" fi
Enter input value1 x=?
12
Enter input value2 y=?
34
X is less than Y
6. Using Switch case - Print YES if Y/y is user input and NO for N/n 6666666666666666
#!/bin/bash echo 'Enter input char=?' ; read char case "$char" in Y) echo "YES" ;; y) echo "YES" ;; n) echo "NO" ;; N) echo "NO" ;; esac
Enter input char=?
y
YES
7. Check triangle is SCALENE,ISOSCELES or EQUILATERAL . Get sides of triangle as user input.
#!/bin/bash echo 'Enter triangle side1 length x=?' ; read x echo 'Enter triangle side1 length y=?' ; read y echo 'Enter triangle side1 length z=?' ; read z if [ $x -eq $y ] && [ $y -eq $z ] then echo "EQUILATERAL triangle" elif [ $x -eq $y ] || [ $y -eq $z ] || [ $x -eq $z ] then echo "ISOSCELES triangle" else echo "SCALENE triangle" fi
Enter triangle side1 length x=?
6
Enter triangle side1 length y=?
5
Enter triangle side1 length z=?
5
ISOSCELES triangle
8. Sum of N natural numbers. Take user input value of N.
#!/bin/bash echo -n "Enter number N=?" read N s=0 # here sum for((i=1; i <=N ; i++)) do let s=$s+$i done echo "sum= "$s
[cloudera@quickstart Desktop]$ sh sum.sh
Enter number N=?5
sum= 15
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