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Tuition > Learn Tuition > Write a program to swap values of two variables with...
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Write a program to swap values of two variables with and without using third variable.

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A mathematics enthusiast, B.Sc. (Maths), M.Sc (Pure Maths) PhD Maths (Pursuing).

I assume you know Python 3, so I'll answer using that, similar can be done in other languages.1) #suppose you want to switch values of a and b temp = a #we create a temp variable which will store the value of a a = b; b = temp#Now, if we hadn't created temp variable then b would take the value of a but...
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I assume you know Python 3, so I'll answer using that, similar can be done in other languages.
1) #suppose you want to switch values of a and b
temp = a #we create a temp variable which will store the value of a
a = b; b = temp
#Now, if we hadn't created temp variable then b would take the value of a but mind that a has a value of b, so b will take the value of a which is not what you want.
2) There is another way and that is using tuples it's most easy you
don't need to make any 3rd variable. it's simply:
a,b = b, a #you can add parenthesis if you want. that's it you've swapped the values.

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If the kid is not ready to sit, it means he has logical thinking. Try to teach him in taking real-life examples like discussion sums in which you can include his name and his friends. In this way, he will be taking an interest.
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Working as a Data Scientist in Bangalore, India

Python script first = 10 second = 20 print(first, second) first,second = second, first print(first, second) For any further queries, contact me
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With third variable Swap(a,b): c=a a=b b=c Without third variable Swap(a,b): a = a+b b= a-b a= a-b
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With third variable

Swap(a,b):

     c=a

     a=b

     b=c

 

Without third variable

Swap(a,b):

      a = a+b

      b= a-b

      a= a-b

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Investment in education gives the best return.

I am using python! >> A = 2 >> B = 3 >> A = A + B # A = 5 >> B = A - B # 5-3 = 2, now ,B = 2 >> A = A - B # 5-2 = 3, now ,A = 3
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Programming is an creative Art . I help students to be creative artist by learning coding skill.

A=2 B=4 A=A+B B= A-B A=A-B
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#include<stdio.h> int main() { int a=10, b=20; printf("Before swap a=%d b=%d",a,b); a=a+b;//a=30 (10+20) b=a-b;//b=10 (30-20) a=a-b;//a=20 (30-10) printf("\nAfter swap a=%d b=%d",a,b); return 0; } Before swap a=10 b=20 After swap a=20...
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  1. #include<stdio.h>  
  2.  int main()    
  3. {    
  4. int a=10, b=20;      
  5. printf("Before swap a=%d b=%d",a,b);      
  6. a=a+b;//a=30 (10+20)    
  7. b=a-b;//b=10 (30-20)    
  8. a=a-b;//a=20 (30-10)    
  9. printf("\nAfter swap a=%d b=%d",a,b);    
  10. return 0;  
  11. }   
Before swap a=10 b=20
After swap a=20 b=10

 

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Student who can understand problems of other students better

Enter value of x,y than x = x+y than y = x-y than x = x-y print swapped value x,y.
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Certified Tamil Teacher with 25 Years of Professional Teaching Experience

With 3rd Variable: int temp, a, b; temp = a; a = b; b = temp; Without 3rd Variable: int a,b; a = a + b; b = a - b; a = a - b;
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Programming Language Instructor in C, C++, JAVA.

If you are coding in C++ language then this will help you: #include<iostream.h> int main(){ int a=10, b=20; a=a+b; b=a-b; a=a-b; cout<<a<<" "<<b; return 0; }
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