Comparison Operators and Conditional Logic
Comparison operators let you specify conditions for comparing values and finding values that match specified patterns. To use a comparison operator, specify the values that you want to compare together with an operator that separates these values.
Equality
| Operators | Description |
|---|---|
| -eq | equals |
| -ne | not equals |
| -gt | greater than |
| -ge | greater than or equal |
| -lt | less than |
| -le | less than or equal |
Containment
| Operators | Description |
|---|---|
| -contains | Returns true when reference value contained in a collection |
| -notcontains | Returns true when reference value not contained in a collection |
| -in | Returns true when test value contained in a collection |
| -notin | Returns true when test value not contained in a collection |
Matching
| Operators | Description |
|---|---|
| -like | Returns true when string matches wildcard pattern |
| -notlike | Returns true when string does not match wildcard pattern |
| -match | Returns true when string matches regex pattern – $matches contains matching strings |
| -notmatch | Returns true when string does not match regex pattern – $matches contains matching strings |
Replacement
| Operators | Description |
|---|---|
| -replace | replace a string pattern |
Type comparison
| Operators | Description |
|---|---|
| -is | Returns true if both object are the same type |
| -isnot | Returns true if the objects are not the same type |
By default, all comparison operators in powershell’s are case-insensitive. If we need to make a comparison operator case-sensitive, precede the operator name with a “c”. For example, the case-sensitive version of -eq is -ceq. If we need to the case-insensitivity explicit, precede the operator with an i. For example, the explicitly case-insensitive version of -eq is -ieq. Let we discuss more about the each set of operators in upcoming articles.