WHEN DO WE USE SINGLE = SIGN AND WHEN DO WE USE 2 == SIGNS AS SUCH?

#1

In most cases we use single = sign but here inside the round brackets of the if block 2 == signs have been used. Please explain when we use which ?

#2

Hey @gopsss12

= is an assignment operator and u can say
if LHS=RHS then here LHS value is set to RHS

== is a conditional operator and if LHS==RHS then it returns true if both LHS & RHS are equal otherwise false

I hope this resolves your query :slight_smile:

#3

But where do we use == and where do we use = sign can you please explain with examples??Will = work inside circular brackets?

#4

Yes it will work there as well but we dont use it there

int a=10 ; //here we want to assign value hence single =

if(a==10) //here we want to check if a is equal to 10 or not hence ==

#5

Here refer to this as well

Assignment Operator (=)

= is an Assignment Operator in C, C++ and other programming languages, It is Binary Operator which operates on two operands.

= assigns the value of right side expression’s or variable’s value to the left side variable.

Let’s understand by example:

x=(a+b);
y=x;
Here, When first expression evaluates value of (a+b) will be assigned into x and in second expression y=x; value of variable xwill be assigned into y.

Equal To Operator (==)

== is an Equal To Operator in C and C++ only, It is Binary Operator which operates on two operands.

== compares value of left and side expressions, return 1 if they are equal other will it will return 0.

Let’s understand by example:

int x,y;
x=10;
y=10;
if(x==y)
printf(“True”);
else
printf(“False”);
When expression x==y evaluates, it will return 1 (it means condition is TRUE) and “TRUE” will print

If your doubt is resolved then hit a like to let me know :slight_smile:

1 Like
#6

In the above example you gave and in general if we use = instead of == in normal brackets of IF ELSE CONDITION will it work or throw an error I presume it will throw an error BECAUSE THEN WE ARE ASSIGNING A VALUE TO THE VARIABLE IN QUESTION AND NOT COMPARING ITS VALUE TO SOMETHING ELSE but can you please confirm the same??

#7

No it wont throw an error
Im that case it will assign x with y and that condition will be evaluated as true always

#8

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