Q:

Error: \'else\' without a previous \'if\' in C

belongs to collection: C Common Errors Programs

mahmoud2506
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2022-05-04
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Error: 'else' without a previous 'if' in C

This error: 'else' without a previous 'if' is occurred when you use else statement after terminating if statement i.e. if statement is terminated by semicolon.

if...else statements have their own block and thus these statement do not terminate.

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mahmoud2506
2022-05-04
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Consider the given code:

#include <stdio.h>

int main()
{
	int a = 10;
	if(a==10);
	{
		printf("True\n");
	}
	else
	{
		printf("False\n");
	}

	return 0;
}

Output

prog.c: In function 'main':
prog.c:8:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(a==10);
     ^~
prog.c:9:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     {
     ^
prog.c:12:5: error: 'else' without a previous 'if'
     else
     ^~~~
 

How to fix?

See the statement, if(a==10);

Here, if statement is terminated by semicolon (;). Thus, Error: 'else' without a previous 'if' in C is occurred.

To fix the error remove the semicolon (;) after the if statement.

Correct code:

#include <stdio.h>

int main()
{
	int a = 10;
	if(a==10)
	{
		printf("True\n");
	}
	else
	{
		printf("False\n");
	}

	return 0;
}

Output

True

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